Two-level LED security light with motion sensor

ABSTRACT

The disclosure is a connectivity APP loaded in a mobile phone for configuring a linkable security lighting system comprising a plurality of LED security lights installed outdoors, wherein by operating the connectivity APP the plurality of LED security lights are divided into N groups of member security lights to be linked. Each group of member security lights is assigned a group code to be applied to each member security light in the group such that within the group the member security lights are interlinked wirelessly via wireless signals prefixed with the same group code, wherein when a member security light is initiated by a sensing signal for operating an illumination mode, the member security light being initiated acts as a commander to transmit an instruction signal to activate all member security lights belonging to the same group code to synchronously operate the illumination mode.

CROSS-REFERENCE TO RELATED APPLICATION

This Application is a continuation in part application of priorapplication Ser. No. 16/668,599, filed Oct. 30, 2019, which issued asU.S. Pat. No. 10,770,916 on Sep. 8, 2020. U.S. Pat. No. 10,770,916 is acontinuation of application Ser. No. 16/244,671, filed Jan. 10, 2019,which issued as U.S. Pat. No. 10,516,292 on Dec. 24, 2019. U.S. Pat. No.10,516,292 is a continuation of application Ser. No. 15/896,403, filedFeb. 14, 2018, which issued as U.S. Pat. No. 10,225,902 on Mar. 5, 2019.U.S. Pat. No. 10,225,902 is a continuation of application Ser. No.15/785,658, filed Oct. 17, 2017, which issued as U.S. Pat. No.10,326,301 on Jun. 18, 2019. U.S. Pat. No. 10,326,301 is a continuationof application Ser. No. 15/375,777, filed Dec. 12, 2016, which issued asU.S. Pat. No. 9,826,590 on Nov. 21, 2017. U.S. Pat. No. 9,826,590 is acontinuation of application Ser. No. 14/836,000, filed Aug. 26, 2015,which issued as U.S. Pat. No. 9,622,325 on Apr. 11, 2017. U.S. Pat. No.9,622,325 is a divisional of application Ser. No. 14/478,150, filed Sep.5, 2014, which issued as U.S. Pat. No. 9,445,474 on Sep. 13, 2016. U.S.Pat. No. 9,445,474 is a continuation of application Ser. No. 13/222,090,filed Aug. 31, 2011, which issued as U.S. Pat. No. 8,866,392 on Oct. 21,2014.

INCORPORATION BY REFERENCE/MPEP 2163.07(b)

The following prior arts with associated disclosures are hereinrequested to be incorporated into the current application:

-   1. U.S. Pat. 9,345,112 B2 titled “MICROCONTROLLER-BASED    MULTIFUNCTIONAL ELECTRONIC SWITCH AND LIGHTING APPARATUS HAVING THE    SAME ” filed on Dec. 22, 2014 and granted on May 17, 2016. The '112    Patent is a continuation in part of the original application of U.S.    Pat. No. 8,947,000 which is the first founding patent for a large    family collection of member patents involving using the technology    of the microcontroller based electronic switch to control a light    intensity of a light-emitting unit.    -   The '112 Patent is in turn the second founding patent for a        subfamily of member patents involving using a technology of two        LED loads emitting light with different color temperature to        work with the technology of the microcontroller-based electronic        switches to control a color temperature tuning and switching        scheme of an LED load.    -   The applicant herein requests to incorporate the contents of the        '112 Patent including all disclosures, embodiments and drawings        to the specification of the current application according to        MPEP 2163.07(b).-   2. U.S. Pat. No. 10,136,503 B2 titled “MICROCONTROLLER-BASED    MULTIFUNCTIONAL ELECTRONIC SWITCH AND LIGHTING APPARATUS HAVING THE    SAME ” filed on Sep. 13, 2017 and granted on Nov. 20, 2018. The '503    Patent is a member patent in the family collection of member patents    under the first founding patent '000 and is also a member patent in    the subfamily collection of member patents under the second founding    Patent '112.    -   The '503 Patent teaches a system and a method of using two        microcontroller based electronic switches respectively connected        to two LED loads emitting light with different color        temperatures to control and allocate different electric powers        respectively delivered to the two LED loads for performing        multiple working modes including on/off control mode, dimming        mode, color temperature tuning mode, color temperature switching        mode, color temperature dim to warm mode, commanding mode for        controlling a lighting family comprising a plurality of member        lamps remotely located or delay shut off mode.    -   The applicant herein requests to incorporate the contents of the        '503 Patent including all disclosures, embodiments and drawings        to the specification of the current application according to        MPEP 2163.07(b).-   3. U.S. Pat. No. 10,470,276 B2 titled “METHOD OF TUNING LIGHT COLOR    TEMPERATURE FOR LED LIGHTING DEVICE AND APPLICATION THEREOF” was    filed on Oct. 17, 2018 and granted on Nov. 5, 2019. The '276 Patent    teaches a method and application of performing a light color    temperature tuning control for an LED lamp includes using a first    LED load emitting light with a low color temperature and a second    LED load emitting light with a second color temperature thru a light    diffuser, using a power allocation circuitry working with a power    allocation algorithm to control different electric power    respectively delivered to the first LED load while keeping the total    electric power unchanged to generate different diffused light color    temperatures.    -   Applicant herein requests to incorporate the contents of the        '276 Patent including all disclosures, embodiments and drawings        by reference to the specification of the current application        according to MPEP 2163.07(b).-   4. U.S. Pat. No. 11,063,585 titled “METHOD OF TUNING LIGHT COLOR    TEMPERATURE FOR LED LIGHTING DEVICE AND APPLICATION THEREOF” was    continuation of application of the '276 Patent, filed on Aug. 7,    2019 and granted on Jul. 13, 2021. The '585 Patent discloses a    theory and a technical foundation for building a technical frame of    a color temperature tuning technology for an LED lamp composing a    power allocation algorithm, a power allocation circuitry and at    least one external control device for activating a color temperature    tuning and switching scheme.    -   The applicant herein request to incorporate the contents of the        '585 Patent including all disclosures, all embodiments and all        drawings to the specification of the current application        according to MPEP 2163.07(b).-   5. U.S. Pat. No. 8,866,392 B2 titled “TWO-LEVEL LED SECURITY LIGHT    WITH MOTION SENSOR ” was filed on Aug. 31, 2011 and granted on Oct.    21, 2014. The '392 Patent discloses technologies for operating a two    level LED security light; at night the LED security light is    automatically turned on for a low level illumination, when a motion    intrusion signal is detected by the motion sensor, the LED security    light is switched from the low level illumination with a low color    temperature to a high level illumination with a high color    temperature to maximize an effect of security alert for a short    duration time, at dawn the LED security light is automatically    turned off.    -   The '392 Patent is the founding application for a large family        collection of member patents involving automatic illumination        control technologies including light intensity tuning and light        color temperature tuning. The applicant herein requests to        incorporate the contents of the '392 Patent including all        disclosures, embodiments and drawings to the specification of        the current application according to MPEP 2163.07(b).-   6. U.S. Pat. No. 10,516,292 B2 titled “TWO-LEVEL LED SECURITY LIGHT    WITH MOTION SENSOR” was a member patent under the founding patent    '392, filed on Jan. 10, 2019 and granted on Dec. 24, 2019. The '292    Patent is a member patent in the family collection of patents under    the founding patent '392.    -   The '292 Patent discloses a lifestyle LED security light        including a light-emitting unit configured with two sets of LED        loads respectively emitting different color temperature light,        at dusk the light-emitting unit is automatically turned on for a        first level illumination with a low color temperature featuring        an aesthetic night view with the motion sensor being deactivated        for a first time duration, and then the light-emitting unit is        changed to a second level illumination with motion sensor being        activated, when the motion sensor detects a motion intrusion        signal, the light-emitting unit is instantly switched to perform        a third level illumination with a high light intensity and a        high color temperature. The color temperatures of the first        level illumination and the third level illumination are        respectively adjustable by simultaneously and reversely        adjusting the electric powers allocated to the two sets of LED        loads.    -   The applicant herein request to incorporate the contents of the        '292 Patent to the specification of the current application        according to MPEP 2163.07(b).-   7. U.S. Pat. No. 10,770,916 B2 titled “TWO-LEVEL LED SECURITY LIGHT    WITH MOTION SENSOR ” was filed on Oct. 30, 2019 and granted on Sep.    8, 2020. The '916 Patent is a member patent in the family collection    of patents under the founding patent '392.    -   The '916 Patent teaches a method of configuring an LED light        with a tunable diffused light color temperature. The method        comprises using a light-emitting unit configured with a first        LED load emitting light with a low color temperature and a        second LED load emitting light with a high color temperature        electrically connected in parallel, using a light diffuser to        cover the first LED load and the second LED load create a        diffused light with a diffused light color temperature, using        two semiconductor switching devices working in conjunction with        a controller to respectively control a first electric power        delivered to the first LED load and a second electric power        delivered to the second LED load to operate a color temperature        tuning and switching scheme and using a first external control        device to output at least one first external control signal to        activate a selection of a diffused light color temperature.    -   The applicant herein requests to incorporate the contents of the        '916 Patent including all disclosures, all embodiments and all        drawings to the specification of the current application        according to MPED 2163.07(b).-   8. U.S. Pat. No. 10,763,691 B2 titled “TWO-LEVEL LED SECURITY LIGHT    WITH MOTION SENSOR” was filed on Mar. 19, 2020 and granted on Sep.    1, 2020. The '691 Patent is a member patent in the family collection    of patents under the original founding patent '392. The '691 Patent    discloses a technology of tuning the light color temperature of a    lifestyle LED light by blending the two LED loads emitting light    with different color temperatures thru a light diffuser with an    arrangement that a first electric power delivered to a first LED    load emitting light with a low color temperature and a second    electric power delivered to a second LED load emitting light with a    high color temperature are reversely and complementarily adjusted    for tuning a diffused light color temperature such that a total    light intensity generated by the LED light is kept essentially    unchanged.    -   The applicant herein requests to incorporate the contents of the        '691 Patent including all disclosures, embodiments and drawings        to the specification of the current application according to        MPEP 2163.07(b).-   9. U.S. Pat. No. 10,187,947 B2 titled “LIFE-STYLE LED SECURITY    LIGHT” was issued on Jan. 22, 2019. The applicant herein requests to    incorporate the contents of the '947 Patent including all    disclosures, embodiments and drawings to the specification of the    current application according to MPEP 2163.07(b).-   10. U.S. Pat. No. 10,491,032 B2 titled “LIFESTYLE SECURITY LIGHT”    was issued on Nov. 26, 2019. The applicant herein requests to    incorporate the contents of the '032 Patent including all    disclosures, embodiments and drawings to the specification of the    current application according to MPEP 2163.07(b).-   11. U.S. Pat. No. 10,225,902 B2 titled “TWO-LEVEL SECURITY LIGHT    WITH MOTION SENSOR ” was issued on Mar. 5, 2019. The applicant    herein requests to incorporate the contents of the '902 Patent    including all disclosures, embodiments and drawings to the    specification of the current application according to MPEP    2163.07(b).-   12. U.S. Pat. No. 10,326,301 B2 titled “TWO-LEVEL LED SECURITY LIGHT    WITH MOTION SENSOR” was issued on Jun. 18, 2019. The applicant    herein requests to incorporate the contents of the '301 Patent    including all disclosures, embodiments and drawings to the    specification of the current application according to MPEP    2163.07(b).-   13. U.S. Pat. No. 9,326,362 B2 titled “TWO-LEVEL LED SECURITY LIGHT    WITH MOTION SENSOR ” was issued on Apr. 26, 2016. The applicant    herein requests to incorporate the contents of the '362 Patent    including all disclosures, embodiments and drawings to the    specification of the current application according to MPEP    2163.07(b).-   14. U.S. Pat. No. 9,560,719 B2 titled “LED SECURITY LIGHT AND LED    SECURITY LIGHT CONTROL DEVICE THEREOF ” was issued on Jan. 31, 2017.    The applicant herein requests to incorporate the contents of the    '719 Patent including all disclosures, embodiments and drawings to    the specification of the current application according to MPEP    2163.07(b).-   15. U.S. Pat. No. 10,154,564 B2 titled “APP BASED FREE SETTING    METHOD FOR SETTING OPERATING PARAMETER OF SECURITY LIGHT ” was    issued on Dec. 11, 2018. The applicant herein requests to    incorporate the contents of the '564 Patent including all    disclosures, embodiments and drawings to the specification of the    current application according to MPEP 2163.07(b).-   16. U.S. Pat. No. 10,667,367 B2 titled “APP BASED FREE SETTING    METHOD FOR SETTING OPERATING PARAMETER OF SECURITY LIGHT ” was    issued on May. 26, 2020. The applicant herein requests to    incorporate the contents of the '367 Patent including all    disclosures, embodiments and drawings to the specification of the    current application according to MPEP 2163.07(b)

BACKGROUND OF THE INVENTION 1. Technical Field

The present disclosure relates to a lighting apparatus, in particular,to a two-level security LED light with motion sensor

2. Description of Related Art

Lighting sources such as the fluorescent lamps, the incandescent lamps,the halogen lamps, and the light-emitting diodes (LED) are commonlyfound in lighting apparatuses for illumination purpose. Photoresistorsare often utilized in outdoor lighting applications for automaticilluminations, known as the Photo-Control (PC) mode. Timers may be usedin the PC mode for turning off the illumination or for switching to alower level illumination of a lighting source after the lighting sourcehaving delivered a high level illumination for a predetermined duration,referred as the Power-Saving (PS) mode. Motion sensors are often used inthe lighting apparatus for delivering full-power illumination thereoffor a short duration when a human motion is detected, then switchingback to the PS mode. Illumination operation controls such asauto-illumination in accordance to the background brightness detection,illumination using timer, illumination operation control using motionsensing results (e.g., dark or low luminous power to fully illuminated),and brightness control are often implemented by complex circuitries. Inparticular, the design and construction of LED drivers are still of acomplex technology with high fabrication cost.

Therefore, how to develop a simple and effective design method onillumination controls such as enhancing contrast in illumination andcolor temperature for various types lighting sources, especially thecontrols for LEDs are the topics of the present disclosure.

SUMMARY OF THE INVENTION

An exemplary embodiment of the present disclosure provides a two-levelLED security light with motion sensor which may switch to high levelillumination in the Power-Saving (PS) mode for a predetermined durationtime when a human motion is detected thereby achieve warning purposeusing method of electric current or lighting load adjustment.Furthermore, prior to the detection of an intrusion, the LED securitylight may be constantly in the low level illumination to save energy.

An exemplary embodiment of the present disclosure provides a two-levelLED security light including a power supply unit, a light sensingcontrol unit, a motion sensing unit, an external control unit, a loadingand power control unit, and a light-emitting unit. The light-emittingunit further includes one or a plurality of series- and/orparallel-connected LEDs; when the light sensing control unit detectsthat the ambient light is lower than a predetermined value, the loadingand power control unit turns on the light-emitting unit to generate ahigh level or a low level illumination; when the light sensing controlunit detects that the ambient light is higher than the predeterminedvalue, the loading and power control unit turns off the light-emittingunit; when the motion sensing unit detects a human motion in the PSmode, the loading and power control unit increases the electric currentthat flows through the light-emitting unit so as to generate the high orfull level illumination for a predetermined duration.

Another exemplary embodiment of the present disclosure provides atwo-level LED security light including a power supply unit, a lightsensing control unit, a motion sensing unit, an external control unit, aloading and power control unit, a light-emitting unit. Thelight-emitting unit includes a plurality of series- and/orparallel-connected LEDs. When the light sensing control unit detectsthat the ambient light is lower than a predetermined value, the loadingand power control unit turns on a portion or all the LEDs of thelight-emitting unit to generate a low level or a high levelillumination; when the light sensing control unit detects that theambient light is higher than the predetermined value, the loading andpower control unit turns off all the LEDs in the light-emitting unit;when the motion sensing unit detects a human motion in the PS mode, theloading and power control unit turns on a plurality of LEDs in thelight-emitting unit and generates the high or full level illuminationfor a predetermine duration. An electric current control circuit isintegrated in the exemplary embodiment for providing constant electriccurrent to drive the LEDS in the light-emitting unit.

One exemplary embodiment of the present disclosure provides a two-levelLED security light including a power supply unit, a light sensingcontrol unit, a motion sensing unit, a loading and power control unit,and a light-emitting unit. The light-emitting unit includes a phasecontroller and one or a plurality of parallel-connected alternatingcurrent (AC)LEDs. The phase controller is coupled between the describedone or a plurality parallel-connected ACLEDs and AC power source. Theloading and power control unit may through the phase controller controlthe average power of the light-emitting unit; when the light sensingcontrol unit detects that the ambient light is lower than apredetermined value, the loading and power control unit turns on thelight-emitting unit to generate a high level or a lower levelillumination; when the light sensing control unit detects that theambient light is higher than the predetermined value, the loading andpower control unit turns off the light-emitting unit; when the motionsensing unit detects a human motion in the PS mode, the loading andpower control unit increases the average power of the light-emittingunit thereby generates the high level illumination for a predetermineduration.

According to an exemplary embodiment of the present disclosure, atwo-level LED security light includes a power supply unit, a lightsensing control unit, a motion sensing unit, a loading and power controlunit, and a light-emitting unit. The light-emitting unit includes X highwattage ACLEDs and Y low wattage ACLEDs connected in parallel. When thelight sensing control unit detects that the ambient light is lower thana predetermined value, the loading and power control unit turns on theplurality of low wattage ACLEDs to generate a low level illumination;when the light sensing control unit detects that the ambient light ishigher than a predetermined value, the loading and power control unitturns off the light-emitting unit; when the motion sensor detects anintrusion, the loading and power control unit turns on both the highwattage ACLEDs and the low wattage ACLEDs at same time thereby generatesa high level illumination for a predetermine duration, wherein X and Yare of positive integers.

According to an exemplary embodiment of the present disclosure, atwo-level LED security light with motion sensor includes a power supplyunit, a light sensing control unit, a motion sensing unit, a loading andpower control unit, and a light-emitting unit. The light-emitting unitincludes a rectifier circuit connected between one or a plurality ofparallel-connected AC lighting sources and AC power source. The loadingand power control unit may through the rectifier circuit adjust theaverage power of the light-emitting unit. When the light sensing controlunit detects that the ambient light is lower than a predetermined value,the loading and power control unit turns on the light-emitting unit togenerate a low level illumination; when the light sensing control unitdetects that the ambient light is higher than the predetermined value,the loading and power control unit turns off the light-emitting unit;when the motion sensing unit detects an intrusion, the loading and powercontrol unit increases the average power of the light-emitting unitthereby generates a high level illumination for a predetermine duration.The rectifier circuit includes a switch parallel-connected with a diode,wherein the switch is controlled by the loading and power control unit.

To sum up, a two-level LED security light with motion sensor provided byan exemplary embodiment in the preset disclosure, may executePhoto-Control (PC) and Power-Saving (PS) modes. When operates in the PCmode, the lighting apparatus may auto-illuminate at night andauto-turnoff at dawn. The PC mode may generate a high or a low levelillumination for a predetermined duration then automatically switch tothe PS mode by a control unit to generate a low level or a cutoffillumination. When the motion sensor detects a human motion, thedisclosed LED security light may immediate switch to the high or fulllevel illumination for a short predetermined duration thereby achieveillumination or warning effect. After the short predetermined duration,the LED security light may automatically return to the low levelillumination for saving energy. Although ACLEDs are used in someembodiments, the present invention is not limited in applying on theACLEDs. It can be implemented with DC LEDs or DC LEDs in AC module suchas LED bulbs incorporating with adequate power sources and circuitrieswhich commonly known by a person of skill in the art.

In order to further understand the techniques, means and effects of thepresent disclosure, the following detailed descriptions and appendeddrawings are hereby referred, such that, through which, the purposes,features and aspects of the present disclosure can be thoroughly andconcretely appreciated; however, the appended drawings are merelyprovided for reference and illustration, without any intention to beused for limiting the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the present disclosure, and are incorporated in andconstitute a part of this specification. The drawings illustrateexemplary embodiments of the present disclosure and, together with thedescription, serve to explain the principles of the present disclosure.

FIG. 1 schematically illustrates a block diagram of a two-level LEDsecurity light in accordance with an exemplary embodiment of the presentdisclosure.

FIG. 1A is an enhanced block diagrammed under FIG. 1 to specificallyillustrate an embodiment of FIG. 1 for a two-level LED security light,wherein the loading and power control unit comprises a switchingcircuitry and a microcontroller, wherein the switching circuitry furthercomprises a bidirectional semiconductor switching device for controllingan average electric power to be delivered to the LED.

FIG. 1B is an enhanced block diagrammed under FIG. 1 to specificallyillustrate an embodiment of FIG. 1 for a two-level LED security light,wherein the loading and power control unit comprises a switchingcircuitry and a microcontroller, wherein the switching circuitry furthercomprises an unidirectional semiconductor switching device forcontrolling an average electric power to be delivered to the LED.

FIG. 1C is an enhanced block diagrammed under FIG. 1 to specificallyillustrate an embodiment of FIG. 1 for a two-level LED security lightincluding a first set having N number LEDs and a second set having Mnumber LEDs, wherein the loading and power control unit comprises aswitching circuitry and a microcontroller, wherein the switchingcircuitry further comprises bidirectional semiconductor switchingdevices for controlling an average electric power to be delivered to theLED.

FIG. 1D is an enhanced block diagrammed under FIG. 1 to specificallyillustrate an embodiment of FIG. 1 for a two-level LED security lightincluding a first set having N number LEDs and a second set having Mnumber LEDs, wherein the loading and power control unit comprises aswitching circuitry and a microcontroller, wherein the switchingcircuitry further comprises unidirectional semiconductor switchingdevices for controlling an average electric power to be delivered to theLED.

FIG. 2A illustrates a schematic diagram of a two-level LED securitylight in accordance to the first exemplary embodiment of the presentdisclosure.

FIG. 2B graphically illustrates a timing waveform of a pulse widthmodulation (PWM) signal in accordance to the first exemplary embodimentof the present disclosure.

FIG. 3A illustrates a schematic diagram of a two-level LED securitylight in accordance to the second exemplary embodiment of the presentdisclosure.

FIG. 3B illustrates a schematic diagram of a two-level LED securitylight in accordance to the second exemplary embodiment of the presentdisclosure.

FIG. 4A illustrates a schematic diagram of a two-level LED securitylight in accordance to the third exemplary embodiment of the presentdisclosure.

FIG. 4B illustrates a timing waveform of two-level LED security light inaccordance to the third exemplary embodiment of the present disclosure.

FIG. 5 illustrates a schematic diagram of a two-level LED security lightin accordance to the third exemplary embodiment of the presentdisclosure.

FIG. 6 illustrates a schematic diagram of a two-level LED security lightin accordance to the fourth exemplary embodiment of the presentdisclosure.

FIG. 7 illustrates a schematic diagram of a two-level LED security lightin accordance to the fifth exemplary embodiment of the presentdisclosure.

FIGS. 8A, 8B, 8C and 8D schematically and respectively show I-Vrelationship charts (Forward Current vs. Forward Voltage) for a whiteLED chip from each of 4 different LED manufacturers.

FIG. 9 is a data sheet showing data of the minimum forward voltages andmaximum forward voltages collected from various LED manufacturers forgenerating a designated constant forward current to produce a requiredlumens output.

FIG. 10A illustrates a block diagram of a connectivity APP loaded in amobile device in accordance to an exemplary embodiment of the presentdisclosure.

FIG. 10B illustrates a schematic diagram of an LED security light inaccordance to an exemplary embodiment of the present disclosure.

FIG. 10C illustrates a schematic diagram of another LED security lightin accordance to an exemplary embodiment of the present disclosure.

FIG. 10D illustrates a system block for establishing a linkable electricapparatuses system in accordance to a generalized exemplary embodimentof the present disclosure.

FIG. 11 illustrates a system flow chart to elucidate a method in settingidentification codes for grouping and interlinking LED security lightbased on FIG. 10A and FIG. 10B in accordance to an exemplary embodimentof the present disclosure.

FIG. 12 illustrates a flow chart to elucidate a system dynamic foroperating a linkable LED security lighting system based on FIG. 10A andFIG. 10B in accordance to an exemplary embodiment of the presentdisclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Reference is made in detail to the exemplary embodiments of the presentdisclosure, examples of which are illustrated in the accompanyingdrawings. Wherever possible, the same reference numbers are used in thedrawings and the description to refer to the same or alike parts.

First Exemplary Embodiment

Refer to FIG. 1, which schematically illustrates a block diagram of atwo-level LED security light in accordance to the first exemplaryembodiment of the present disclosure. A two-level LED security light(herein as the lighting apparatus) 100 includes a power supply unit 110,a light sensing control unit 120, a motion sensing unit 130, an externalcontrol unit 160, a loading and power control unit 140, and alight-emitting unit 150. The power supply unit 110 is used for supplyingpower required to operate the system, wherein the associated structureincludes the known AC/DC power converter. The light sensing control unit120 may be a photoresistor, which may be coupled to the loading andpower control unit 140 for determining daytime or nighttime inaccordance to the ambient light. The motion sensing unit 130 may be apassive infrared sensor (PIR), which is coupled to the loading and powercontrol unit 140 and is used to detect intrusions. When a person isentering a predetermined detection zone of the motion sensing unit 130,a sensing signal thereof may be transmitted to the loading and powercontrol unit 140. The external control unit 160 is coupled to theloading and power control unit 140 for setting various operatingparameters of a security light including at least a time length setting(a time setting unit) for various illumination modes, at least a lightintensity setting for various illumination modes and switching betweenillumination modes. The external control unit 160 may be configured witha push button, a touch sensor, a voltage divider, a power interruptiondetection circuitry or a wireless remote control receiver for processingsignals interpretable by the loading and power control unit 140.

The loading and power control unit 140 which is coupled to thelight-emitting unit 150 may be implemented by a microcontroller. Theloading and power control unit 140 may control the illumination levelsof the light-emitting unit 150 in accordance to the sensing signaloutputted by the light sensing control unit 120 and the motion sensingunit 130. The light-emitting unit 150 may include a plurality of LEDsand switching components. The loading and power control unit 140 maycontrol the light-emitting unit 150 to generate at least two levels ofillumination variations.

When the light sensing control unit 120 detects that the ambient lightis lower than a predetermined value (i.e., nighttime), the loading andpower control unit 140 executes the Photo-Control (PC) mode by turningon the light-emitting unit 150 to generate a high level illumination fora predetermined duration then return to a low level illumination forPower-Saving (PS) mode. When the light sensing control unit 120 detectsthat the ambient light is higher than a predetermined value (i.e.,dawn), the loading and power control unit 140 turns off thelight-emitting unit 150. In the PS mode, when the motion sensing unit130 detects a human motion, the loading and power control unit 140 mayincrease the electric current which flow through the light-emitting unit150, to generate the high level illumination for a short predeterminedduration. After the short predetermined duration, the loading and powercontrol unit 140 may automatically lower the electric current that flowthrough the light-emitting unit 150 thus have the light-emitting unit150 return to low level illumination for saving energy.

Refer to 2A, which illustrates a schematic diagram of a two-level LEDsecurity light in accordance to the first exemplary embodiment of thepresent disclosure. The light sensing control unit 120 may beimplemented by a light sensor 220; the motion sensing unit 130 may beimplemented by a motion sensor 230; the loading and power control unit140 may be implemented by a microcontroller 240. The light-emitting unit250 includes three series-connected LEDs L1˜L3. The LEDs L1˜L3 isconnected between a DC source and a transistor Q1, wherein the DC sourcemay be provided by the power supply unit 110. The transistor Q1 may bean N-channel metal-oxide-semiconductor field-effect-transistor (NMOS).The transistor Q1 is connected between the three series-connected LEDsL1˜L3 and a ground GND. The loading and power control unit 140implemented by the microcontroller 240 may output a pulse widthmodulation (PWM) signal to the gate of transistor Q1 to control theaverage electric current. It is worth to note that the electriccomponents depicted in FIG. 2A only serves as an illustration for theexemplary embodiment of the present disclose and hence the presentdisclosure is not limited thereto.

Refer to FIG. 2B concurrently, which graphically illustrates a timingwaveform of a pulse width modulation (PWM) signal in accordance to thefirst exemplary embodiment of the present disclosure. In the PC mode,the PWM signal may be used to configure the transistor Q1 to have theconduction period T_(on) being longer than the cut-off period T_(off).On the other hand in the PS mode, the PWM signal may configure thetransistor Q1 to have the conduction period T_(on) being shorter thanthe cut-off period T_(off). In comparison of the illumination levelsbetween the PC and PS modes, as the conduction period T_(on) oftransistor Q1 being longer under the PC mode, therefore have higheraverage electric current driving the light-emitting unit 250 therebygenerate high illumination, which may be classified as the high levelillumination; whereas as the conduction period T_(on) of transistor Q1is shorter in the PS mode, therefore have lower average electric currentdriving the light-emitting unit 250 thereby generate low illumination,which may be classified as the low level illumination.

The microcontroller 240 turns off the light-emitting unit 250 during theday and activates the PC mode at night by turning on the light-emittingunit 250 to generate the high level illumination for a shortpredetermined duration then return to the low level illumination therebyentering the PS mode. When the motion sensor 230 detects a human motionin the PS mode, the light-emitting unit 250 may switch to the high levelillumination for illumination or warning application. The light-emittingunit 250 may return to the low level illumination after maintaining atthe high level illumination for a short predetermined duration to saveenergy.

In addition, the microcontroller 240 is coupled to a time setting unit260, wherein the time setting unit 260 may allow the user to configurethe predetermined duration associated with the high level illuminationin the PC mode, however the present disclosure is not limited thereto.The time setting unit is a type of external control units designed toprocess various external control signals interpretable by the controllerfor setting at least a time length setting for various illuminationmodes.

Second Exemplary Embodiment

Refer again to FIG. 1, wherein the illumination variations of thelight-emitting unit 150 may be implemented through the number oflight-source loads being turned on to generate more than two levels ofillumination. The lighting apparatus 100 in the instant exemplaryembodiment may be through turning on a portion of LEDs or all the LEDsto generate a low and a high level of illuminations.

Refer to FIG. 3A concurrently, which illustrates a schematic diagram ofa two-level LED security light 100 in accordance to the second exemplaryembodiment of the present disclosure. The main difference between FIG.3A and FIG. 2A is in the light-emitting unit 350, having threeseries-connected LEDs L1˜L3 and NMOS transistors Q1 and Q2. The LEDsL1˜L3 are series connected to the transistor Q1 at same time connectedbetween the DC source and a constant electric current control circuit310. Moreover, transistor Q2 is parallel connected to the two endsassociated with LEDs L2 and L3. The gates of the transistors Q1 and Q2are connected respectively to a pin PC and a pin PS of themicrocontroller 240. The constant electric current control circuit 310in the instant exemplary embodiment maintains the electric current inthe activated LED at a constant value, namely, the LEDs L1˜L3 areoperated in constant-current mode.

Refer to FIG. 3A, the pin PC of the microcontroller 240 controls theswitching operations of the transistor Q1; when the voltage level of pinPC being either a high voltage or a low voltage, the transistor Q1 mayconduct or cut-off, respectively, to turn the LEDs L1˜L3 on or off. Thepin PS of the microcontroller 240 controls the switch operations of thetransistor Q2, to form two current paths 351 and 352 on thelight-emitting unit 350. When the voltage at the pin PS of themicrocontroller 240 is high, the transistor Q2 conducts, thereby formingthe current path 351 passing through the LED L1 and the transistor Q2;when the voltage at the pin PS being low, the transistor Q2 cuts-off,thereby forming the current path 352 passing through all the LEDs L1˜L3.The microcontroller 240 may then control the switching operation of thetransistor Q2 to turn on the desired number of LEDs so as to generate ahigh or a low level illumination.

When light sensor 220 detects that the ambient light is higher than apredetermined value, the microcontroller 240 through the pin PC outputsa low voltage, which causes the transistor Q1 to cut-off and turns offall the LEDs L1˜L3 in the light-emitting unit 350. Conversely, when thelight sensor 220 detects that the ambient light is lower than thepredetermined value, the microcontroller 240 activates the PC mode,i.e., outputting a high voltage from pin PC and a low voltage from pinPS, to activate the transistor Q1 while cut-off the transistor Q2,thereby forming the current path 352, to turn on the three LEDs L1˜L3 inthe light-emitting unit 350 so as to generate the high levelillumination for a predetermined duration. After the predeterminedduration, the microcontroller 240 may switch to the PS mode by havingthe pin PC continue outputting a high voltage and the pin PS outputtinga high voltage, to have the transistor Q2 conducts, thereby forming thecurrent path 351. Consequently, only the LED L1 is turned on and the lowlevel illumination is generated.

When the motion sensor detects a human motion in the PS mode, the pin PSof the microcontroller 240 temporarily switches from the high voltage toa low voltage, to have the transistor Q2 temporarily cuts-off thusforming the current path 352 to activate all the LEDs in thelight-emitting unit 350, thereby temporarily generates the high levelillumination. The light-emitting unit 350 is driven by a constantelectric current, therefore the illumination level generated thereof isdirectly proportional to the number of LEDs activated. FIG. 3Billustrates another implementation for FIG. 3A, wherein the relays J1and J2 are used in place of NMOS transistors to serve as switches. Themicrocontroller 240 may control the relays J2 and J1 through regulatingthe switching operations of the NPN bipolar junction transistors Q4 andQ5. Moreover, resistors R16 and R17 are current-limiting resistors.

In the PC mode, the relay J1 being pull-in while the relay J2 bounce offto have constant electric current driving all the LEDs L1˜L3 to generatethe high level illumination; in PS mode, the relays J1 and J2 bothpull-in to have constant electric current only driving the LED L1 thusthe low level illumination may be thereby generated. Furthermore, whenthe motion sensor 230 detects a human motion, the pin PS of themicrocontroller 240 may temporarily switch from high voltage to lowvoltage, forcing the relay J2 to temporarily bounce off and the relay J1pull-in so as to temporarily generate the high level illumination.

The LED L1 may adopt a LED having a color temperature in a range between2000K and 3000K, while the LEDs L2 and L3 may adopt LEDs having a colortemperature between 4000K and 6500K in order to increase the contrastbetween the high level and the low level illuminations. The number ofLEDs included in the light-emitting unit 350 may be more than three, forexample five or six LEDs. The transistor Q2 may be relatively parallelto the two ends associated with a plurality of LEDs to adjust theillumination difference between the high and the low illuminationlevels. Additionally, the light-emitting unit 350 may include aplurality of transistors Q2, which are respectively coupled to the twoends associated with each LED to provide more lighting variationselections. The microcontroller 240 may decide the number of LEDs toturn on in accordance to design needs at different conditions. Based onthe explanation of the aforementioned exemplary embodiment, those skillsin the art should be able to deduce other implementation and furtherdescriptions are therefore omitted.

Third Exemplary Embodiment

Refer back to FIG. 1, wherein the light-emitting unit 150 may include aphase controller and one or more parallel-connected alternating current(AC) LEDs. The phase controller is coupled between the described one ormore parallel-connected ACLEDs and AC power source. The loading andpower controller 140 in the instant exemplary embodiment may through thephase controller adjust the average power of the light-emitting unit 150so as to generate variations in the low level and the high levelilluminations.

Refer to FIG. 4A, which illustrates a schematic diagram of a two-levelLED security light 100 in accordance to the third exemplary embodimentof the present disclosure. The main difference between FIG. 4A and FIG.3 is in that the light-source load is an ACLED, which is coupled to theAC power source, and further the light-emitting unit 450 includes aphase controller 451. The phase controller 451 includes a bi-directionalswitching device 452, here, a triac, a zero-crossing detection circuit453, and a resistor R. The microcontroller 240 turns off thelight-emitting unit 450 when the light sensor 220 detects that theambient light is higher than a predetermined value. Conversely, when thelight sensor 220 detects that the ambient light is lower than thepredetermined value, the microcontroller 240 activates the PC mode byturning on the light-emitting unit 450. In the PC mode, themicrocontroller 240 may select a control pin for outputting a pulsesignal which through a resistor R triggers the triac 452 to have a largeconduction angle. The large conduction angle configures thelight-emitting unit 450 to generate a high level illumination for apredetermined duration. Then the microcontroller 240 outputs the pulsesignal for PS mode through the same control pin to trigger the triac 452to have a small conduction angle for switching the light-emitting unit450 from the high level illumination to the low level illumination ofthe PS mode. Moreover, when the motion sensor 230 (also called motionsensing unit) detects a human motion in the PS mode, the microcontroller240 temporarily outputs the PC-mode pulse signal through the samecontrol pin to have the light-emitting unit 450 generated the high levelillumination for a short predetermined duration. After the shortpredetermined duration, the light-emitting unit 450 returns to the lowlevel illumination.

In the illumination control of the ACLED, the microcontroller 240 mayutilize the detected zero-crossing time (e.g., the zero-crossing time ofan AC voltage waveform) outputted from the zero-crossing detectioncircuit 453 to send an AC synchronized pulse signal thereof which maytrigger the triac 452 of the phase controller 451 thereby to change theaverage power input to the light-emitting unit 450. As the ACLED has acut-in voltage v_(t) for start conducting, thus if the pulse signalinaccurately in time triggers the conduction of the triac 452, then theinstantaneous value of AC voltage may be lower than the cut-in voltagev_(t) of ACLED at the trigger pulse. Consequently, the ACLED may resultin the phenomenon of either flashing or not turning on. Therefore, thepulse signal generated by the microcontroller 240 must fall in a propertime gap behind the zero-crossing point associated with the ACsinusoidal voltage waveform.

Supposing an AC power source having a voltage amplitude v_(m) andfrequency f, then the zero-crossing time gap t_(D) of the trigger pulseoutputted by the microcontroller 240 should be limited according tot_(o)<t_(D)<½f−t_(o) for a light-source load with a cut-in voltagev_(t), wherein t_(o)=(½πf)sin⁻¹ (V_(t)/V_(m)). The described criterionis applicable to all types of ACLEDs to assure that the triac 452 can bestably triggered in both positive and negative half cycle of the ACpower source. Take ACLED with v_(t) (rms)=80 V as an example, andsupposing the V_(m) (rms)=110 V and f=60 Hz, then t_(o)=2.2 ms and(½f)=8.3 ms may be obtained. Consequently, the proper zero-crossing timegap t_(D) associated with the phase modulation pulse outputted by themicrocontroller 240 which lagged the AC sinusoidal voltage waveformshould be designed in the range of 2.2 ms<t_(D)<6.1 ms.

Refer to FIG. 4B, which illustrates a timing waveform of the two-levelLED security light in accordance to the third exemplary embodiment ofthe present disclosure. Waveforms (a)˜(d) of FIG. 4B respectivelyrepresent the AC power source, the output of the zero-crossing detectioncircuit 453, the zero-crossing delay pulse at the control pin of themicrocontroller 240, and the voltage waveform across the two ends of theACLED in the light-emitting unit 450. The zero-crossing detectioncircuit 453 converts the AC voltage sinusoidal waveform associated withthe AC power source to a symmetric square waveform having a low and ahigh voltage levels as shown in FIG. 4B(b). At the zero-crossing pointof the AC voltage sinusoidal wave, the symmetric square waveform maytransit either from the low voltage level to the high voltage level orfrom the high voltage level to the low voltage level. Or equivalently,the edge of the symmetric square waveform in the time domain correspondsto the zero-crossing point of the AC voltage sinusoidal waveform. Asshown in FIG. 4B(c), the microcontroller 240 outputs a zero-crossingdelay pulse in correspondence to the zero-crossing point of the ACsinusoidal waveform in accordance to the output waveform of thezero-crossing detection circuit 453. The zero-crossing delay pulse isrelative to an edge of symmetric square waveform behind a time gap t_(D)in the time domain. The t_(D) should fall in a valid range, as describedpreviously, to assure that the triac 452 can be stably triggered therebyto turn on the ACLED. FIG. 4B(d) illustrates a voltage waveform appliedacross the two ends associated with the ACLED. The illumination level ofthe light-emitting unit 450 is related to the conduction period t_(on)of the ACLED, or equivalently, the length t_(on) is directlyproportional to the average power inputted to the ACLED. The differencebetween the PC mode and the PS mode being that in the PC mode, the ACLEDhas longer conduction period, thereby generates the high levelillumination; whereas in the PS mode, the ACLED conduction period isshorter, hence generates the low level illumination.

Refer to FIG. 5, which illustrates a schematic diagram of a two-levelLED security light 100 in accordance to the third exemplary embodimentof the present disclosure. The light-emitting unit 550 of the lightingapparatus 100 includes an ACLED1, an ACLED2, and a phase controller 551.The phase controller 551 includes triacs 552 and 553, the zero-crossingdetection circuit 554 as well as resistors R1 and R2. The light-emittingunit 550 of FIG. 5 is different from the light-emitting unit 450 of FIG.4 in that the light-emitting unit 550 has more than one ACLEDs and morethan one bi-directional switching devices. Furthermore, the colortemperatures of the ACLED1 and the ACLED2 may be selected to bedifferent.

In the exemplary embodiment of FIG. 5, the ACLED1 has a high colortemperature, and the ACLED2 has a low color temperature. In the PC mode,the microcontroller 240 uses the phase controller 551 to trigger bothACLED1 and ACLED2 to conduct for a long period, thereby to generate thehigh level illumination as well as illumination of mix colortemperature. In the PS mode, the microcontroller 240 uses the phasecontroller 551 to trigger only the ACLED2 to conduct for a short period,thereby generates the low level illumination as well as illumination oflow color temperature. Moreover, in the PS mode, when the motion sensor230 detects a human motion, the microcontroller 240 may through thephase controller 551 trigger the ACLED land ACLED2 to conduct for a longperiod. Thereby, it may render the light-emitting unit 450 to generatethe high level illumination of high color temperature and to producehigh contrast in illumination and hue, for a short predeterminedduration to warn the intruder. Consequently, the lighting apparatus maygenerate the high level or the low level illumination of different hue.The rest of operation theories associated with the light-emitting unit550 are essentially the same as the light-emitting unit 450 and furtherdescriptions are therefore omitted.

Fourth Exemplary Embodiment

Refer to FIG. 6, which illustrates a schematic diagram of a two-levelLED security light 100 in accordance to the fourth exemplary embodimentof the present disclosure. The light-emitting unit 150 of FIG. 1 may beimplemented by the light-emitting unit 650, wherein the light-emittingunit 650 includes three ACLED1˜3 having identical luminous power as wellas switches 651 and 652. In which, switches 651 and 652 may be relays.The parallel-connected ACLED1 and ACLED2 are series-connected to theswitch 652 to produce double luminous power, and of which the ACLED3 isparallel connected to, to generate triple luminous power, and of whichan AC power source is further coupled to through the switch 651.Moreover, the microcontroller 240 implements the loading and powercontrol unit 140 of FIG. 1. The pin PC and pin PS are respectivelyconnected to switches 651 and 652 for outputting voltage signals tocontrol the operations of switches 651 and 652 (i.e., open or close).

In the PC mode, the pin PC and pin PS of the microcontroller 240 controlthe switches 651 and 652 to be closed at same time. Consequently, theACLED1˜3 are coupled to the AC power source and the light-emitting unit650 may generate a high level illumination of triple luminous power.After a short predetermined duration, the microcontroller 240 returns toPS mode. In which the switch 651 is closed while the pin PS controls theswitch 652 to be opened, consequently, only the ACLED3 is connected toAC power source, and the light-emitting unit 650 may thus generate thelow level illumination of one luminous power. In the PS mode, when themotion sensor 230 detects a human motion, the microcontroller 240temporarily closes the switch 652 to generate high level illuminationwith triple luminous power for a predetermined duration. After thepredetermined duration, the switch 652 returns to open status thereby togenerate the low level illumination of one luminous power. The lightingapparatus of FIG. 6 may therefore through controlling switches 651 and652 generate two level illuminations with illumination contrast of atleast 3 to 1.

The ACLED1 and ACLED2 of FIG. 6 may be high power lighting sourceshaving a color temperature in a range between 4000K and 6500K. TheACLED3 may be a low power lighting source having a color temperaturebetween 2000K and 3000K. Consequently, the ACLED may generate two levelsof illuminations with high illumination and hue contrast without using azero-crossing detection circuit.

Fifth Exemplary Embodiment

Refer to FIG. 7, which illustrates a schematic diagram of a two-levelLED security light in accordance to the fifth exemplary embodiment ofthe present disclosure. The light-emitting unit 750 of FIG. 7 isdifferent from the light-emitting unit 640 of FIG. 6 in that the ACLED3is series-connected to a circuit with a rectified diode D and a switch753 parallel-connected together, and of which is further coupled througha switch 751 to AC power source. When the switch 753 closes, the ACelectric current that passes through the ACLED3 may be a full sinusoidalwaveform. When the switch 753 opens, the rectified diode rectifies theAC power, thus only one half cycle of the AC electric current may passthrough the ACLED, consequently the luminous power of ALCED3 is cut tobe half.

The pin PS of the microcontroller 240 synchronously controls theoperations of switches 752 and 753. If the three ACLED1˜3 have identicalluminous power, then in the PC mode, the pin PC and pin PS of themicrocontroller 240 synchronously close the switches 751˜753 to renderACLED1˜3 illuminating, thus the light-emitting unit 750 generates a highlevel illumination which is three-times higher than the luminous powerof a single ACLED. When in the PS mode, the microcontroller 240 closesthe switch 751 while opens switches 752 and 753. At this moment, onlythe ACLED3 illuminates and as the AC power source is rectified by therectified diode D, thus the luminous power of ACLED3 is half of the ACpower source prior to the rectification. The luminous power ratiobetween the high level and the low level illuminations is therefore 6to 1. Consequently, strong illumination contrast may be generated toeffectively warn the intruder.

It should be noted that the light-emitting unit in the fifth exemplaryembodiment is not limited to utilizing ACLEDs. In other words, thelight-emitting unit may include any AC lighting sources such as ACLEDs,incandescent lamps, or fluorescent lamps.

A lighting apparatus may be implemented by integrating a plurality ofLEDs with a microcontroller and various types of sensor components inthe controlling circuit in accordance to the above described fiveexemplary embodiments. This lighting apparatus may automaticallygenerate high level illumination when the ambient light detected isinsufficient and time-switch to the low level illumination. In addition,when a person is entering the predetermined detection zone, the lightingapparatus may switch from the low level illumination to the high levelillumination, to provide the person with sufficient illumination or togenerate strong illumination and hue contrast for monitoring theintruder.

When the light source of the light-emitting unit 150 is confined to theuse of an LED load, the compliance and satisfaction of a voltageoperating constraint attributable to the unique electricalcharacteristics of the LED load is vital to a successful performance ofan LED lighting device. Any LED lighting device failing to comply withthe voltage operating constraint of the unique electricalcharacteristics is bound to become a trouble art. This is because theLED as a kind of solid state light source has completely differentelectrical characteristics for performing light emission compared withconventional light source such as incandescent bulbs or fluorescentbulbs. For instance, for a white light LED or blue light LED thereexists a very narrow voltage domain ranging from a threshold voltage ataround 2.5 volts to a maximum operating voltage at around 3.5 volts,which allows the LEDs to operate adequately and safely; in other words,when a forward voltage imposed on the LED is lower than the thresholdvoltage, the LED is not conducted and therefore no light is emitted,when the forward voltage exceeds the maximum operating voltage, the heatgenerated by a forward current could start damaging the construction ofthe LED. Therefore, the forward voltage imposed on the LED is requiredto operate between the threshold voltage and the maximum operatingvoltage.

In respect to the LED load of the light-emitting unit 150, the cut-involtage V_(t) of ACLEDs is technically also referred to as the thresholdvoltage attributable to PN junctions manufactured in LEDs. Morespecifically, the LED is made with a PN junction semiconductor structureinherently featured with three unique electrical characteristics, thefirst characteristic is one-way electric conduction through the PNjunction fabricated in the LED, the second electrical characteristic isa threshold voltage V_(th) required to trigger the LED to start emittinglight and the third electrical characteristic is a maximum operatingvoltage V_(max) allowed to impose on the LED to avoid a thermal runawayto damage or burn out the semiconductor construction of the LED. Thedescribed cut-in voltage V_(t) has the same meaning as the abovementioned threshold voltage V_(th) which is a more general term to beused for describing the second electrical characteristic of a PNjunction semiconductor structure. Also because the cut-in voltage V_(t)is specifically tied to forming a formula to transform the thresholdvoltage into a corresponding time phase of AC power for lightingcontrol, it is necessary to use the term V_(th) as a neutral word fordescribing the LED electrical characteristics to avoid being confusedwith the specific application for ACLED alone. Additionally, it is to beclarified that the term Vm is related to the amplitude of the instantmaximum voltage of an AC power source which has nothing to do with thethird electrical characteristic V_(max) of an LED load.

An LED chip is a small piece of semiconductor material with at least oneLED manufactured inside the semiconductor material. A plurality of LEDsmay be manufactured and packaged inside an LED chip for different levelsof wattage specification to meet different illumination need. The LEDcan also be designed with a larger size of PN junction such that ahigher forward current can be generated for higher wattage applicationswithout damaging the LED structure but in such case less quantity ofLEDs can be produced. For each LED designed with a different level ofwattage specification there always exists a narrow voltage domainV_(th)<V<V_(max), wherein V is a voltage across each LED, wherein V_(th)is the threshold voltage to enable the LED to start emitting light andV_(max) is the maximum operating voltage imposed on the LED to avoid theLED from being damaged or burned out by the heat generated by the highoperating voltage at V_(max). Such voltage constraints are attributableto the different semiconductor materials used, different manufacturingand packaging processes employed. Although the values of thresholdvoltage and maximum operating voltage may vary within a narrowdispersion of distribution among LEDs produced from differentmanufacturers, they can be represented by some reference values whichare learned from cumulation of manufacturing and practicing experiencesby the LED manufacturers. The reference values are necessary and usefulto serve as guidelines for designing LED driver to ensure an LED voltagebin selected does comply with the narrow voltage domain V_(th)<V<V_(max)for generating a constant forward current to produce a designated lightintensity. LEDs are batch-produced by wafers and each wafer is designedto produce a large quantity of LEDs which may respectively requiredifferent forward voltages within a narrow distribution range forgenerating a designated forward current. For instance if a batch of#2835 0.5 watt LEDs are used to generate a designated forward current at150 mA, among the batch of LEDs produced from the same manufacturer,there exists a distribution range of required forward voltages from 2.9volts (Minimum Forward Voltage, VFMIN) to 3.3 volts (Maximum ForwardVoltage, VFMAX) to generate the same designated forward current, thebatch of LEDs is further divided and grouped by the manufacturer into afew voltage bins with each voltage bin having a much smaller subrange offorward voltages bounded by a bin minimum forward voltage VBMIN and abin maximum forward voltage VBMAX for generating the same forwardcurrent. For instance the distribution range may be divided into fourvoltage bins with a first bin accommodating a forward voltage subrangefrom 2.9 volts to 3.0 volts, a second voltage bin accommodating aforward voltage subrange from 3.0 volts to 3.1 volts, a third binaccommodating a forward voltage subrange from 3.1 volts to 3.2 volts,and a fourth bin accommodating a forward voltage subrange from 3.2 voltsto 3.3 volts. The LEDs grouped in the first bin belong to the mostefficient LEDs produced from the wafer as they only need lowest forwardvoltages to generate same designated forward current, then followed bythe second bin, then followed by the third bin and then the fourth binbeing the least efficient LEDs produced by the wafer as they needhighest forward voltages to generate same forward current. LEDmanufacturers sell LEDs by voltage bins with each voltage bin containinga plurality of LEDs which requires different forward voltages togenerate a designated forward current for emitting light. Such divisionof LEDs by voltage bins is necessitated in order to minimize avolatility of forward voltages for generating a designated constantforward current. Otherwise a large swing of forward voltages between themaximum forward voltage VFMAX and the minimum forward voltage VFMINcould easily cause an LED load fail because the VFMAX required fordriving the least efficient LED(s) could be too close to or exceedingthe maximum operating voltage V_(max), which could cause the LED loaddamaged or burned out since all LEDs are electrically connected inseries. In others words without the division of forward voltages byvoltage bins it would be difficult to comply with the constraints ofV_(th)<V<V_(max). Similar bin arrangements are also applicable to colortemperature performance and brightness performance for LEDs producedfrom a wafer. Generally speaking LED voltage bins with lower forwardvoltages can be priced higher than LED voltage bins with higher forwardvoltages. Both the minimum forward voltage VBMIN and the maximum forwardvoltage VBMAX in each voltage bin selected are required to comply withvoltage operating constraint V_(th)<V <V_(max), wherein V is a variableof forward voltage in the subrange of the voltage bin selected, whereinV_(th) is a reference value of a threshold voltage required to triggereach LED in the batch of LEDs produced from the manufacturer to emitlight and V_(max) is a reference value of a maximum operating voltageacross each LED in the batch of LEDs from the manufacturer at which theLED is vulnerable to a thermal damage. Please notice VBMIN and VBMAXrespectively represent the lowest forward voltage and the highestforward voltage among the batch of LEDs for a selected voltage binproduced by the LED manufacturer to generate a designated constantforward current for outputting a designated lumens whereas the thresholdvoltage V_(th) and the maximum operating voltage V_(max) respectivelyrefer to a minimum forward voltage to trigger any LED to startgenerating a forward current and a maximum forward voltage at which theLED is possibly vulnerable to a thermal damage. When an LED load of anLED lighting device is configured with a plurality of N pieces of LEDselectrically connected in series or N sets of in parallel connected

LEDs electrically connected in series, a working voltage V_(N) imposedon the LED load is therefore required to be in a range between N×V_(th)and N×V_(max), namely, N×V_(th)<V_(N)<N×V_(max). When the plurality ofLEDs are white light LEDs produced by coating at least one phosphorcompound on surfaces of blue light LEDs, a reference value of thethreshold voltage V_(th) is estimated at 2.5 volts and a reference valueof the maximum operating voltage V_(max) is estimated at 3.5 voltssubject to an operating condition that a temperature of each LEDconnecting pin is controlled at or below 80 degrees centigrade thru anadequate design of a heat sink, therefore the voltage V across each LEDof the N pieces of LEDs is thereby required to comply with an operatingconstraint of 2.5 volts<V<3.5 volts and the working voltage V_(N)imposed on the LED load is thereby confined in a domain expressed byN×2.5 volts<V_(N)<N×3.5 volts.

For any LED lighting device comprising an LED load it is required thatthe LED load in conjunction with an adequate level of power source isconfigured with a combination of in series and/or in parallelconnections of LEDs such that the electric current passing through eachLED of the LED load remains at an adequate level such that a voltage Vacross each LED complies with the voltage operating constraint ofV_(th)<V<V_(max) featuring electrical characteristics of the LED and theworking voltage V_(N) across the LED load configured with N number ofLEDs connected in series complies with an operating constraint ofN×V_(th)<V_(N)<N×V_(max).

FIGS. 8A, 8B, 8C and 8D comprises 4 drawings schematically andrespectively showing a I-V relationship chart (Forward Current vs.Forward Voltage) for a #2835 0.5 watt white light LED from each of 4different LED manufacturers; as can be seen from the chart when aforward voltage V is below a threshold voltage at around 2.5 volts, theLED is essentially not conducted so a forward current I is essentiallyequal to zero, as the forward voltage exceeds 2.5 volts the LED isactivated to generate a current flow to emit light, as the forwardvoltage continues to increase, the forward current I increasesexponentially at an accelerated pace, at a maximum forward voltage ataround 3.5 volts the forward current I becomes 250 mA or higher, whichcould generate a heat that could start damaging the PN junction of theLED (Cree J Series 2835 LEDs). While an LED can be designed with alarger PN junction for operating a higher level of forward current forgenerating a higher lumens output, it is to be noticed the operatingconstraint of forward voltage has little to do with the dimensions of PNjunction designed, therefore V_(th)<V<V_(max) remains effective andnecessary as such forward voltage constraint is attributable to thematerials used in making the phosphor based white light LED. Although anLED is a current driven light emitter, it is to be recognized thatultimately it is the voltage that generates the current flow to drivethe LED to emit light, no voltage no light emission so to speak. Asshown in the I-V relationship chart, when the forward voltage isincreased from 2.5 volts to 3.5 volts for the Cree 2835 LED, thecorresponding forward current is substantially increased from 0 to 250mA. Such feature of a high performance leverage of a large variation offorward current against a small variation of forward voltage makes itinappropriate to use a voltage as a variable to accurately controllumens output of an LED load. Instead it is more appropriate to use andto vary the constant current to operate the LED load. There are at leasttwo reasons which support the use of the constant current source foroperating the LED load: first, when a forward voltage varies by a 5%tolerance the forward current could vary in multiple like 40% to 50% forexample. This could cause some LED(s) damaged in the LED load since weall know the LEDs from the same wafer have different forward voltagesfor generating same forward current second, when the forward voltagevaries a 5% tolerance the forward current could vary in multiple toresult into a 40% to 50% fluctuation in light intensity which obviouslycannot be accepted by consumers. A constant current source is alwaysconfigured with a voltage power source to work in conjunction with aconstant current control circuit which comprises a feedback circuit toprovide a current information to the controller of the voltage powersource for continuously adjusting output voltage level such that thecurrent is kept constant. In the semiconductor industry including theLED, the values of electrical parameters which characterize the naturalinherent properties of semiconductor materials often are not precise orfixed, they always come with a range of distribution with a narrowdispersion, namely a reference range. For semiconductor devices indifferent categories of applications such as silicon based diode versuscompound semiconductors based LED such as GaAs or GaP, their respectivevalues of electrical parameters have very different distribution rangesthough they all have the common features of having to operate in aconduction period between different threshold voltages and differentmaximum operating voltages. For semiconductor devices in the samecategory of application, the values are also different among differentmanufacturers though the variation ranges are much smaller and morepredictable. Even the same white light LEDs produced from the same waferthere still exists a small yet predictable variation range ofdistribution as disclosed in the above descriptions for Cree 2835 LEDabout the structure of the LED voltage bins. They are just the naturalinherent properties of semiconductor materials that the electricalparameters of semiconductor materials are impossibly represented byfixed values instead they always come with ranges of probabilitydistribution with a narrow dispersion. With the above explanations beingdisclosed it is necessary to interpret or define the threshold voltagebeing a narrow interval comprised of a reference value plus a smalltolerance e.g. 5% to 10%, or the reference ranges, therefore thereference value of threshold voltage at 2.5 volts with 5% tolerancewould mean 2.5 volts+5%×2.5 volts=2.625 volts and the reference value ofmaximum operating voltage at 3.5 volts would mean 3.5 volts−5%×3.5volts=3.325 volts, therefore the forward voltage V is interpretablyoperated as 2.5 volts<2.625 volts<V <3.325 volts<3.5 volts.

FIG. 9 is a data sheet showing data of the minimum forward voltages andmaximum forward voltages for generating a designated forward current forLEDs produced from various LED manufacturers. They are the variationranges of forward voltages formed by pairs of Maximum Forward Voltageand Minimum Forward Voltage of LEDs manufactured by differentmanufacturers before being divided and grouped into different voltagebins. Such variation ranges formed by each VFMAX and VFMIN are alsorequired to satisfy the operating formula 2.5 volts<V<3.5 volts.

In summary, the compliance of voltage operating constraintV_(th)<V<V_(max) featuring electrical characteristics of an LED is acritical technology for ensuring a normal performance of the LED load.Failing to comply with such voltage operating constraint can quickly ageor seriously damage the semiconductor structure of the LED with aconsequence of quick lumens depreciation of the LED bulbs and theproduct lifetime being substantially shortened, which will beunacceptable to the consumers. The compliance of the operatingconstraint V_(th)<V<V_(max) is a necessary matter for any LED lightingdevice though it is not an obvious matter as it requires complicatedtechnologies to calculate and coordinate among an adequate level ofpower source, a control circuitry and a non-linear I-V relationship oflight-emitting load. For conventional lighting load such as incandescentbulb there exists no such operating constraint. This is why in the pastyears there had been many consumers complaining about malfunction of LEDbulbs that the consumers were frustrated with the fast depreciation oflumens output and substantially shortened product lifetime of the LEDbulbs purchased and used. A good example was a law suit case filed bythe Federal Trade Commission on Sep. 7, 2010 (Case No. SACV10-01333 JVS)for a complaint against a leading lighting manufacturer for marketingdeceptive LED lamps and making false claims with respect to the lifetime of their LED lamps and a huge amount of monetary relief was claimedwith the Court in the complaint. To further elaborate the importance ofthe constraints of operating formula V_(th)<V<V_(max), it is necessaryfor the applicant to describe the following system operating flow chartto explain how the operating formula plays its indispensable role in LEDdriver design such that an LED light so designed is always ensured ofbeing operated in a safety range when energized and the LED light can beexpected as an energy saving and long lasting light source; SystemFlowchart for designing an LED driver of an LED Light:

-   -   a) Step 1 Determine a maximum lumens output before a lumens loss        by the light diffuser. For example use a maximum lumens        L_(max)=3200 lumens.    -   b) Step 2 Select an LED capable of generating X lumens, e.g.        X=80 lumens and then calculate a minimum quantity Q_(min) of the        LEDs for configuring the light emitting unit. Q_(min)=3200/80=40        LEDs.    -   c) Step 3 Obtain the corresponding value of the forward current        I which generates the required lumens (e.g. 80 lumens) from the        LED manufacturer's data pool.    -   d) Step 4 Select and obtain an LED voltage bin comprising a        plurality of LEDs with different forward voltages able to        produce same forward current on the I-V relationship curves to        generate same lumens output (e.g. 80 lumens). The selected        voltage bin comprising a plurality of LEDs with different        forward voltages form a bin voltage domain bounded by the        minimum forward voltage VBMIN and the maximum forward voltage        VBMAX .    -   e) Step 5 At this stage both the LED manufacturer and the        circuit designer of the LED light are obliged to carefully check        both VBMIN and VBMAX are in full compliance with the operating        constraints of 2.5 volts<V<3.5 volts, wherein V is a variable of        forward voltages in the voltage domain bounded by VBMIN and        VBMAX, or equivalently V_(th)<VBMIN and V_(BMAX)<V_(max).        -   If V is within the domain between 2.5 volts and 3.5 volts,            the selected LED voltage bin is acceptable. If V is outside            of the domain then the LED voltage bin selected is not            acceptable because the LED light would fail its performance            as disclosed in the specification and claims. Under such            circumstances either the lumens output level is to be            reduced until the corresponding forward voltage falls in the            domain or a different LED which can satisfy the voltage            operating constraint needs to be selected.    -   f) Step 6 Determine a matrix of in parallel and in series        connections of the minimum quantity of LEDs (e.g. 40 LEDs)    -   g) Step 7 Calculate the voltage and the total wattage required        to successfully drive the LED light to perform the maximum        lumens output.

The present disclosure of a two-level LED security light provides aunique lifestyle lighting solution. The motivation of creating suchlifestyle lighting solution has less to do with the energy saving aspectof the low level illumination mode because LED is already a very energysaving light source compared with the conventional incandescent lightsource. For instance, a 10-watt LED security light when operated at alow level at 30% illumination it only saves 7 watts, which is not assignificant as a 100-watt incandescent bulb which can save as much as 70watts when operated at 30% illumination for a low level mode. While itis always good to save some extra energy, it is however not the mainincentives for developing the present invention; the lifestyle lightingsolution of the present disclosure is featured with two innovationswhich meaningfully improve the exquisite tastes of living in theevening, the first innovation is the creation of an aesthetic scene forthe outdoor living environment, wherein at dusk the LED security lightis automatically turned on by the photo sensor to perform the low levelillumination which is necessary for creating a soft and aesthetic nightscene for the outdoor living area (such soft and aesthetic night view isnot achievable by the high level illumination however), the secondinnovation is the creation of a navigation capacity similar to a lighthouse effect for guiding people to safely move toward a destination inthe outdoor living area without getting lost or encountering anaccident. These two innovative functions coupled with the motion sensorto increase illumination when people enter into the short detection areamakes the present invention a perfect lifestyle lighting solution forenjoying an exquisite taste of evening life.

The technical infrastructure of a two-level LED security lights forvarious embodiments as disclosed can be further enhanced and applied toform a linkable LED security lighting system configured with a pluralityof member LED security lights by incorporating a wireless transceiver,namely, a device including a wireless transmitter and a wirelessreceiver, for connecting and communicating with all neighboring memberLED security lights to synchronously control on/off, dimming and colortemperature tuning performances of all linked member LED securitylights.

Prior art U.S. Pat. No. 10,271,404 disclosed a hardware based technologyfor a linked security lighting system established by using an interfaceincluding a channel selector switch for selecting a channel to whicheach lighting unit will be connected. In this way a network can becreated by placing the lighting units proximate to each other andselecting the same channel at the interface at each lighting unit. Ingeneral, this hardware based technology would be limited in someaspects, such as less flexibility in extending channel number when avast network connectivity is required. The present disclosure disclosesa software based technology for establishing a linkable LED securitylighting system using a connectivity APP designed and loaded in a mobilephone; wherein the connectivity APP is configured with two operatingprocesses, wherein a first operating process is to establish a data baseof installed locations for all of said plurality of LED security lightswith each of the plurality of LED security lights being assigned alocation code for identification and for individual control, wherein asecond operating process is a grouping job to divide the plurality ofLED security lights into at least one group of linkable LED securitylights with each group being assigned a group code applicable to eachLED security light in the same group for identification and forsynchronously performing same illumination; wherein the connectivity APPis wirelessly connected with each LED security light of the pluralityLED security lights for generating, assigning, receiving, setting andrecording at least a location code, at least a group code and or atleast one universal code to each LED security light of the plurality ofLED security lights, wherein the location code, the group code and orthe at least one universal code are stored in a memory unit of each LEDsecurity light, wherein after the data base of installed locations forthe plurality of LED security lights being fully established each LEDsecurity light displayed visually on a screen of the mobile devicebecomes identifiable on the connectivity APP to a user to perform agrouping or re-grouping job.

The connectivity APP is a software tool to configure a linkablestructure of a plurality of LED security lights of a lighting systeminstalled in an outdoor living space. The connectivity APP involves anecessary process including to assign a location code and a group codefor each LED security light installed in the outdoor living space and tokey in correspondingly a location code for each LED security light shownon the screen of the connectivity APP. The linkable structure, forinstance, represented by a tree map of LED security lights interlinkedand displayed visually on the connectivity APP, can be changed bymodifying the location codes or the group codes to create new linkablegroups of the plurality of LED security lights. Using modifiablelocation code assigned to each LED security light, the connectivity APPhas the advantages to efficiently and almost unlimited establish alinkable LED security lighting system.

Specifically, the plurality of LED security lights of the linkable LEDsecurity lighting system are divided into N groups of member LEDsecurity lights to be linked. Each group of member LED security lightsis assigned a location code to be applied to each member LED securitylight in the group by operating the connectivity APP for identificationand communication, such that within the group the member LED securitylights are interlinked preferably created via wireless control signalsprefixed with a same location code transmitted thru a transceiver ineach of the member LED security lights, wherein when a member LEDsecurity light first receives a sensing signal for operating anillumination mode, the member LED security light acts as a a commandingmember LED security light to activate all member LED security lightsassigned with the same location code to operate the illumination mode,wherein upon receiving the sensing signal the controller of thecommanding member LED security light operates to output a control signalto activate the illumination mode, at the same time the controllermanages to wirelessly transmit an instruction signal prefixed with thelocation code to remotely activate at least one neighboring member LEDsecurity light with same location code to synchronously operate theillumination mode as performed by the commanding member LED securitylight.

It is to be noticed that the software based technology disclosed in thepresent disclosure has at least four advantages over the hardware basedtechnology disclosed in the U.S. Pat. No. 10,271,404.

First, the present disclosure allows a user to expand a linking space ofN groups unlimitedly at any time while the Prior Art of U.S. Pat. No.10,271,404 is very much fixed and restricted to a limited number ofselections according to a configuration of the channel selector.

Second, the connectivity APP of the present disclosure can be designedto enable a cross-group illumination option, wherein the controller ofat least one selected security light is designed to be additionallyresponsive to at least one wireless instruction signal with a differentlocation code transmitted from at least one separate group.

Third, the present disclosure can be designed to operate a hybridlinkable security lighting system, wherein the controller is programmedto respond to at least two wireless instruction signals including afirst wireless signal with a universal code which can synchronouslyactivate every security light in the lighting system to be turned on atdusk and to be turned off at dawn, and a second wireless signal prefixedwith a location code or a group code to synchronously activate thesecurity lights in a linkable group to perform same illumination when asecurity light in the linkable group first detects a motion signal.

Fourth, once a location code has been assigned and set with everysecurity light in the lighting system and the connectivity APP, the usercan easily change or modify a grouping arrangement on the connectivityAPP without going to each security light for adjusting each channelselector one by one which may require using a ladder for accessing toeach security light for performing manual adjustment.

Referring to FIGS. 10A, 10B, 10C and 10D which illustrate a frameworkfor establishing a linkable security light system in accordance to anexemplary embodiment of the present disclosure. Please refer to FIG.10A. A connectivity APP 801 is pre-loaded in a mobile device 800, forinstance, a mobile phone, for configuring a linkable structure of aplurality of LED security lights of a lighting system. The plurality ofLED security lights are divided into a plurality of linkable groups 803with each linkable group G(i) designated by a location code for eachsecurity light of G(i) group and a group code 805. The mobile device isequipped with a transceiver 862, wherein the transceiver includes awireless transmitter and a wireless receiver, as shown in FIG. 10A, forbi-directional communications during configuring the linkable structurewhen operating the connectivity APP. To enable bi-directionalcommunication, a wireless signal processed by the transceiver comprisesa group code to identify a linkable group G(i), a location code toidentify a single LED security light to be linked in the linkable groupG(i) and an instruction code for executing an operation. The locationcodes and the group codes of the linkable groups are transmitted viawireless signal thru the transceiver of the mobile device to each LEDsecurity light in the linkable group. Please refer to FIG. 10B. The LEDsecurity light 900 is basically composed of a loading and power controlunit 940, a light-emitting unit 950 comprising an LED light load, aplurality of sensors 920, 930, an external control unit 960 includingtime setting devices 961, external control devices 963 and a transceiver962. The transceiver 962 is further composed of a receiver 9621 and atransmitter 9622. The loading and power control unit 940 including acontroller and a switching circuitry, wherein the controller ispreferably a microcontroller with embedded memory unit, wherein thelocation codes and the group codes transmitted from the connectivity APPare received by the receiver 9621 and memorized by the controller of theLED security light for coding an outgoing wireless signal and verifyingan incoming wireless signal thru the transceiver of the LED securitylight during processing a setting of the location codes and the groupcodes, as shown in FIG. 10B, for enabling a linkable operation. Pleasefurther refer to FIG. 10C. The LED security light 901 is basicallysimilar to the LED security light 900 in FIG. 10B. The only differenceis that the LED security light 901 does not have external controldevices and time setting devices. All the functional parameters are setthru the connectivity APP of the mobile device 800.

The location codes and the group codes of the linkable structure can bechanged or modified by operating the connectivity APP for creating a newlinkable structure, and the group belonging of the LED security lightsis then changed accordingly. This is a great advantage of the presentdisclosure when rearranging a tree map of the LED security lights isrequired, wherein desired linked groups can be easily created and testedon a software basis without resorting to adjusting the installationpositions of the LED security lights to be linked.

Referring to FIG. 10D which illustrates a system block 1000 forestablishing a linkable electric apparatuses system. FIG. 10D shows ageneral block 1000 with capability to bi-directionally communicate witha connectivity APP and proximate general blocks of the same type 1000.The general block 1000 is composed of a loading and power control unit1040, an electric load 1050, a sensing control unit 1030 and an externalcontrol unit 1060. The loading and power control unit 1040 includes acontroller and a switching circuitry electrically coupled to theelectric load 1050. The electric load 1050 may be an LED light load, aceiling fan, or any electric appliance used in house. The externalcontrol unit 1060 is designed for adjusting operation parameters of theelectric load 1050 and includes at least a time setting device 1061, atransceiver 1062 and at lest an external control device 1063. Thetransceiver 1062 of the external control unit 1060 enables thru wirelesssignals creating a network of different electric apparatuses withdifferent electric load types linkable and programmable by theconnectivity APP.

Referring to FIG. 11 in view of FIG. 10A and FIG. 10B which illustratesa system flow chart for a method for setting a location code or a groupcode in accordance to an exemplary embodiment of the present disclosure.The method starts with Step 1 to open the connectivity APP on the mobilephone. Then, Step 2 is to divide the plurality of LED security lights inthe lighting system into N linkable groups of illumination zone witheach linkable group comprising at least two LED security lights to belinked for synchronously performing same illumination options, such as,on/off control, dimming control or color temperature tuning control,triggered by various sensors. The setting of N linkable group isstarting from a process index i=0. Step 3 is to turn on all LED securitylights in a first linkable group G(i), wherein i=1. Step 4 is thruwireless signal transmitted from a transceiver 862, as shown in FIG.10A, to wirelessly connect the connectivity APP 801 to a first linkablegroup of selected LED security lights 900, wherein G(i)=G(1). Step 5 isto display the selected LED security lights in G(i) group to appear onAPP control page of a mobile phone. Step 6 is to assign identificationcodes to the first linkable group of selected LED security lights witheach of the selected LED security lights being assigned a location codeand a first group code. Step 7 is for transmitting the location code andthe first group code thru wireless signal transmitted from thetransceiver to each LED security light in the first linkable group G(i),wherein the location code and the the first group code are received andmemorized by a controller, being a microcontroller 940 as shown in FIG.10B, of the LED security light for coding an outgoing wireless signaland verifying an incoming wireless signal for enabling a linkableoperation. After completing the setting of the first group code for thefirst linkable group and after checking the process index i≠N, theprocess resumes to Step 3 for setting a second group code for a secondgroup of selected LED security lights thru Step 7. The recurring processcontinues till all N linkable groups and all LED security lights havecompleted setting of relevant location and group codes foridentification and communication. When a plurality of selected LEDsecurity lights in a linkable group are interlinked, each LED securitylight installed at different locations around an outdoor living area canperform both roles of being a commander as well as being a follower tosynchronously perform on/off control, dimming control or colortemperature tuning control.

Referring to FIG. 12 in view of FIG. 10A and FIG. 10B in accordance toan exemplary embodiment of the present disclosure which uses a blockdiagram to briefly illustrate a system dynamic for configuring andoperating a linkable LED security lighting system following a completionof setting all location codes for all LED security lights in the systemflow chart FIG. 11.

At dusk when a light sensing control unit 920 of one of the plurality ofLED security lights in a linkable group first detects a night timesignal (S121), in other words, the ambient light of the operatinglocation detected by the light-sensing control unit being lower than afirst predetermined value, the LED security light is responsivelyswitched for operating a low level illumination mode to perform a lowlevel illumination (S122), and at the same time the LED security lightacts as a commanding LED security light to activate all LED securitylights in the linkable group, each recognizable with same group code ofthe one of the commanding LED security light, as followers in thelighting system to synchronously operate the low level illumination modeto perform the low level illumination, wherein a controller of thecommanding LED security light operates to output a first wireless signalprefixed with a universal code recognizable by the LED security lightsin the linkable group, wherein the LED security lights in the linkablegroup are activated to synchronously operate the low level illuminationmode to perform the low level illumination (S123); wherein during aperformance of the low level illumination mode when an LED securitylight in a linkable group first detects a motion signal thru a motionsensor (S124), the LED security light accordingly is switched to amotion sensor mode for operating a high level illumination for a presettime length and then resuming to the low level illumination (S125), andat the same time the LED security light acts as a commanding LEDsecurity light to order all linked LED security lights in the linkablegroup to temporarily switch to activate the motion sensor mode toperform a high level illumination for the preset time length beforeresuming to the low level illumination mode (S126), wherein thecommanding LED security light operates to transmit a second wirelesssignal coded with a group code of the one of the commanding LED securitylight thru the transceiver recognizable by the LED security lightsassigned with the same group code in the linkable group, wherein the LEDsecurity lights in the linkable group are activated synchronously tooperate the motion sensor mode.

At dawn when a light sensing control unit of an LED security light inthe lighting system first detects a daytime signal meaning the ambientlight detected by the light sensing control unit being higher than asecond predetermined value (S127), the LED security light acts as acommanding LED security light to synchronously deactivate the pluralityof LED security lights in the lighting system; wherein the controller ofthe commanding LED security light operates to stop outputting the firstwireless signal and the second wireless signal to turn off thelight-emitting units (S128), at the same time the controller of thecommanding LED security light operates to generate and transmit thru thetransceiver a third wireless signal coded with a universal code todeactivate at least one LED security light to turn off the at least oneLED light-emitting unit (S129).

The above disclosed embodiments and technologies are able to providehome owners with a 360 degree illumination surrounding a house for agreat security protection as all linked member LED security lights canbrighten instantly at the same time when a motion intrusion at any spotis detected by one of the plurality of member LED security lights. Ifthe home owner does not need a full surrounding illumination the homeowner can simply manage to divide the plurality of member LED securitylights into linked group and non-linked group such that a partialsurrounding illumination can be performed by the linked group of memberLED security lights while the non-linked group of LED security lightssimply operate the two-level illumination individually andindependently.

The technology of connectivity APP is not limited to the application ofthe linkable outdoor security lighting system working with photo sensorand or motion sensor. In fact, it can also be used to generally replacetraditional channel selection switch for remotely controlling individuallight or grouped lights among a plurality of lights, or individualceiling fan or grouped ceiling fans installed in a living space; similarprocesses may be employed to create a location code, a group code and/orat least one universal code as a communication medium for executing acontrol decision of a lighting control decision between a connectivityAPP designed and loaded in a mobile device such as mobile phone and eachof the plurality of lights and or ceiling fans, wherein said locationcode is used for controlling only one lighting device or one ceilingfan, wherein said group code is used for controlling all lightingdevices or ceiling fans in the same group, wherein said at least oneuniversal code is used for controlling all lighting devices or ceilingfans.

Referring again to FIG. 11 in view of FIG. 10A and FIG. 10B whichillustrates a system flow chart for a method for setting a location codeand a group code in accordance to an exemplary embodiment of the presentdisclosure. The method starts with Step 1 to open the connectivity APPon the mobile phone. Then, Step 2 is to divide the plurality of LEDsecurity lights or ceiling fans in the lighting and/or ceiling systeminto N linkable groups of operating zone with each linkable groupcomprising at least one member LED light, at least one ceiling fan orboth to be individually operating a performance or to be linked forsynchronously performing same illumination options, such as, on/offcontrol, dimming control or speed control. The setting of N linkablegroup is started from a process index i=0. Step 3 is to turn on the atleast one LED light or at least one ceiling fan in a first roundselection, wherein i=1. Step 4 is thru wireless signal transmitted froma transceiver of the mobile phone to wirelessly connect the connectivityAPP to the first round selection of the at least one LED light or the atleast one ceiling fan, wherein G(i)=G(1). Step 5 is to display the atleast one LED light or the at least one ceiling fan to appear on APPcontrol page of the mobile phone. Step 6 is to assign a location codeand a first group code to the first round selection of the at least oneLED light or the at least one ceiling fan with the at least one LEDlight or the at least one ceiling fan being assigned the first groupcode. Step 7 is for transmitting the first group code thru wirelesssignal transmitted from the transceiver to the at least one LED light orthe at least one ceiling fan in the first round selection, wherein thefirst group code is received and memorized by a controller, being amicrocontroller shown in FIG. 10B, of the at least one LED light or theat least one ceiling fan for coding an outgoing wireless signal andverifying an incoming wireless signal for enabling an individual or alinkable synchronous performance. After completing the setting of thefirst group code for the first round selection and after checking theprocess index i≠N, the process resumes to Step 3 for setting a secondgroup code for a second round selection of at least one LED light or atleast one ceiling fan thru Step 7. The recurring process continues tillall N groups and all LED lights or all ceiling fans have completedsettings of relevant location codes for identification andcommunication. When a plurality of selected member LED lights or memberceiling fans in a linkable group are interlinked, each member LED lightor each member ceiling fan installed at different locations around aliving area can perform both roles of being a commander as well as beinga follower to synchronously perform on/off control, dimming control,speed control or color temperature tuning control.

When each linkable item of said plurality of lights or ceiling fans isdesigned with a transmittable item code to identify itself, eachlinkable item may become identifiable by its unique item code on theconnectivity APP when connected, a software can be further developed tomake each linkable item further controllable on a screen of theconnectivity APP. However, it is still missing a location informationfor each linkable item and therefore a user is still not able tomeaningfully make use of such information on the screen of theconnectivity APP. A satellite positioned system, such as GPS with map,may be employed to generate a location information for each linkableitem shown on the screen of the connectivity APP such that a user canrespectively control a functional performance of each linkable item onthe connectivity APP. However, it is to be noticed that people tends tocontrol illumination performance in a living space by area not item byitem. Therefore, the same process as the above described is still neededand the connectivity APP can be designed with a capacity to divide theplurality of lights or ceiling fans into different linked groups to berespectively assigned a group code. The user may touch on a touch paneldisplaying the connectivity APP to select the lights or ceiling fans tobe linked in each group and push a setting button to wirelessly assignan unique group code to each member light or member ceiling fan in thesame group to synchronously operates same illumination performance.

The above mentioned descriptions represent merely the exemplaryembodiment of the present disclosure, without any intention to limit thescope of the present disclosure thereto. Various equivalent changes,alternations or modifications based on the claims of present disclosureare all consequently viewed as being embraced by the scope of thepresent disclosure.

What is claimed is:
 1. An LED security light, comprising at least: alight-emitting unit, including at least a first LED load configured witha plurality of LEDs emitting lights with a first color temperature; aloading and power control unit; a light sensing control unit; a motionsensing unit; a time setting unit including a first time setting deviceand a second time setting device; and a power supply unit; wherein saidloading and power control unit comprises a controller and a switchingcircuitry, wherein said controller is electrically coupled with saidlight sensing control unit, said motion sensing unit, said switchingcircuitry and said time setting unit, wherein said switching circuitryis electrically connected between a power source of said power supplyunit and said light-emitting unit to control and output an electricpower to said light-emitting unit, wherein said power source is a DCpower outputting a constant current, wherein said switching circuitrycomprises at least a first semiconductor switching device, wherein saidcontroller outputs a control signal to control a conduction rate of saidswitching circuitry for delivering different electric powers from saidpower source to drive said light-emitting unit for generating differentilluminations characterized by different light intensities according tosignals respectively received from said light sensing control unit andsaid motion sensing unit; wherein when an ambient light detected by saidlight sensing control unit is lower than a first predetermined value,said loading and power control unit is activated to switch on saidlight-emitting unit to perform a first level illumination mode togenerate a first level illumination for a first predetermined timeduration preset by said first time setting device, wherein when a motionintrusion signal is detected by said motion sensing unit, said loadingand power control unit responsively operates to increase said conductionrate to increase said electric power delivered to said light-emittingunit to perform a second level illumination mode to generate a secondlevel illumination for a second predetermined time duration preset bysaid second time setting device, wherein a light intensity of saidsecond level illumination is higher than a light intensity of said firstlevel illumination, wherein when said ambient light detected by saidlight sensing control unit is higher than a second predetermined value,said loading and power control unit operates to switch off saidlight-emitting unit; wherein during a performance of said first levelillumination mode, when no motion is detected by said motion sensingunit, said first level illumination provides illumination to an area,provides navigation capacity within the illuminated area and preventslight being completely shutoff while a person is within the detectionarea due to expiration of said second predetermined time duration and amotion by said person can bring said LED security light back to saidsecond level illumination; wherein a configuration of said plurality ofLEDs of said light-emitting unit is designed with a combination of inseries and/or in parallel connections such that when incorporated with alevel setting of said DC power for driving said first LED load, anelectric current passing through each LED of said first LED load remainsat a level such that a voltage V across each LED complies with anoperating constraint of V_(th)<V<V_(max) featuring an electricalcharacteristic of each LED, wherein V_(th) is a reference value of athreshold voltage required to trigger each LED to emit light and V_(max)is a reference value of a maximum operating voltage across each LED atwhich at least one LED construction in said plurality of LEDs isvulnerable to a thermal damage.
 2. The LED security light according toclaim 1, wherein said first LED load of said light-emitting unit isconfigured with N pieces of LEDs electrically connected in series or Nsets of in parallel connected LEDs electrically connected in series, aworking voltage V_(N) imposed on said first LED load for driving saidplurality of LEDs is confined in a domain between a minimum voltageequal to the sum of each of said threshold voltages of all LEDselectrically connected in series or sets of in parallel connected LEDselectrically connected in series and a maximum voltage equal to the sumof each of all said maximum operating voltages of all LEDs electricallyconnected in series or sets of in parallel connected LEDs electricallyconnected in series, expressed by N×V_(th)<V_(N)<N×V_(max).
 3. The LEDsecurity light according to claim 2, wherein when said plurality of LEDsare white light LEDs produced by coating at least one phosphor compoundon surfaces of blue light LEDs, said reference value of said thresholdvoltage V_(th) is estimated at 2.5 volts and said reference value ofsaid maximum operating voltage is estimated at 3.5 volts subject to anoperating condition that a temperature of each LED connecting pin iscontrolled at or below 80 degrees centigrade, wherein said voltage Vacross each LED of said N pieces of LEDs complies with an operatingconstraint of 2.5 volts<V<3.5 volts and said working voltage V_(N)imposed on said first LED load is thereby confined in a domain expressedby N×2.5 volts<V_(N)<N×3.5 volts.
 4. The LED security light according toclaim 1, wherein said power supply unit is configured with an AC/DCpower converter to convert an AC power into at least one DC powerrequired for operating said LED security light, wherein a constantcurrent control circuit is installed to output said DC power outputtingsaid constant current necessary to drive said first LED load.
 5. The LEDsecurity light according to claim 1, wherein said power supply unitcomprises a battery module to output at least one DC power for operatingsaid LED security light.
 6. The LED security light according to claim 5,wherein said battery module is a rechargeable battery module.
 7. The LEDsecurity light according to claim 6, wherein said rechargeable batterymodule is a solar battery module including a solar panel, a chargingcircuitry and a rechargeable battery.
 8. The LED security lightaccording to claim 1, wherein a wireless remote control device isfurther installed and is electrically coupled with said controller,wherein said remote control device is configured with a wirelessreceiver and a wireless transmitter to respectively receive a wirelessmotion intrusion signal detected from a neighboring LED security lightand to wirelessly transmit said motion intrusion signal detected by saidmotion sensing unit to at least one neighboring LED security light;wherein when said motion intrusion signal is detected by said motionsensing unit of said LED security light, said loading and power controlunit responsively operates to perform a motion activated illuminationand synchronously operates to wirelessly transmit said motion intrusionsignal thru said wireless transmitter to said at least one neighboringLED security light to control a motion activated lighting performance ofsaid at least one neighboring LED security light.
 9. The LED securitylight according to claim 8, wherein at least one neighboring LEDsecurity light is a single level LED security light, wherein said motionactivated lighting performance operated by said at least one neighboringLED security light is a single level illumination; wherein uponreceiving said motion intrusion signal from said wireless signalreceiver, said at least one neighboring LED security light operates toturn on said light-emitting unit to perform said single levelillumination for a predetermined time duration.
 10. The LED securitylight according to claim 8, wherein said at least one neighboring LEDsecurity light is a two-level LED security light, wherein when saidmotion intrusion signal detected from said LED security light isreceived by said wireless receiver of said at least one neighboring LEDsecurity light, said loading and power control unit of said at least oneneighboring LED security light operates to synchronously increase saidconduction rate of said switching circuitry to increase said electricpower delivered to said light-emitting unit to perform said second levelillumination for said second predetermined time duration.
 11. The LEDsecurity light according to claim 10, wherein for performing said secondlevel illumination, said loading and power control unit of said at leastone neighboring LED security light operates the same second conductionrate of said switching circuitry for generating said second levelillumination in the same way as that of said LED security lightaccording to said motion intrusion signal from said wireless signalreceiver.
 12. The LED security light according to claim 10, wherein forperforming said second level illumination, said loading and powercontrol unit of said at least one neighboring LED security lightoperates a predetermined second conduction rate of said switchingcircuitry for generating said second level illumination.
 13. The LEDsecurity light according to claim 1, wherein said light intensity ofsaid second level illumination is at least 1.5 times of said lightintensity of said first level illumination.
 14. A linkable LED securitylight, comprising: a light-emitting unit, including at least an LED loadconfigured with a plurality of LEDs emitting lights with a colortemperature; a loading and power control unit; a light sensing controlunit; a motion sensing unit; a wireless remote control device configuredwith a wireless signal transmitter and a wireless signal receiver; afirst time setting device for selecting and setting a firstpredetermined time duration; a second time setting device for selectingand setting a second predetermined time duration; and a power supplyunit; wherein said loading and power control unit comprises a controllerand a switching circuitry, wherein said controller is electricallycoupled with said light sensing control unit, said motion sensing unit,said switching circuitry, said wireless signal transmitter, saidwireless signal receiver, said first time setting device and said secondtime setting device; wherein said switching circuitry is electricallyconnected between a power source and said light-emitting unit to controland output an electric power to said light-emitting unit, wherein saidpower source is a DC power outputting a constant current; wherein saidswitching circuitry comprises at least a first semiconductor switchingdevice, wherein said controller outputs a control signal to control aconduction rate of said switching circuitry for delivering differentelectric powers from said power source to drive said light-emitting unitfor generating different illuminations characterized by different lightintensities according to signals respectively received from at leastsaid light sensing control unit, said motion sensing unit and saidwireless signal receiver; wherein when an ambient light detected by saidlight sensing control unit is lower than a first predetermined value,said loading and power control unit operates to switch on saidlight-emitting unit to perform a first level illumination mode togenerate a first level illumination for said first predetermined timeduration preset by said first time setting device; wherein when a motionintrusion signal is detected by said motion sensing unit, said loadingand power control unit in response manages to perform a second levelillumination mode to generate a second level illumination for saidsecond predetermined time duration preset by said second time settingdevice, at the same time said loading and power control unit operates totransmit said motion intrusion signal thru said wireless transmitter toactivate at least one neighboring linkable LED security light tosynchronously perform said second level illumination for said secondpredetermined time duration, wherein a light intensity of said secondlevel illumination is higher than a light intensity of said first levelillumination; wherein when said ambient light detected by said lightsensing control unit is higher than a second predetermined value, saidloading and power control unit operates to switch off saidlight-emitting unit; wherein during a performance of said first levelillumination mode, when no motion is detected by said motion sensingunit, said first level illumination provides illumination to an area,provides navigation capacity within the illuminated area and preventslight being completely shutoff while a person is within the detectionarea due to expiration of said second predetermined time duration and amotion by an occupant can bring said linkable LED security light back tosaid second level illumination; wherein a configuration of saidplurality of LEDs of said light-emitting unit is designed with acombination of in series and/or in parallel connections such that whenincorporated with a level setting of said DC power, an electric currentpassing through each LED of said light-emitting unit remains at a levelsuch that a voltage V across each LED complies with an operatingconstraint of V_(th)<V<V_(max) featuring an electrical characteristic ofeach LED, wherein V_(th) is a reference value of a threshold voltagerequired to trigger each LED to emit light and V_(max) is a referencevalue of a maximum operating voltage across each LED at which at leastone LED construction in said plurality of LEDs is vulnerable to athermal damage.
 15. The linkable LED security light according to claim14, wherein when said LED load is configured with N pieces of LEDselectrically connected in series or sets of in parallel connected LEDselectrically connected in series, a working voltage V_(N) imposed onsaid LED load for driving said plurality of LEDs is confined in a domainbetween a minimum voltage equal to a sum of each of said thresholdvoltages of all LEDs electrically connected in series or sets of inparallel connected LEDs electrically connected in series and a maximumvoltage equal to a sum of each of said maximum operating voltages of allLEDs electrically connected in series or sets of in parallel connectedLEDs electrically connected in series, expressed byN×V_(th)<V_(N)<N×V_(max).
 16. The linkable LED security light accordingto claim 15, wherein when said LED load is configured with white lightLEDs produced by coating at least one phosphor compound on the surfacesof blue light LEDs, said threshold voltage V_(th) has said referencevalue estimated at 2.5 volts and said maximum operating voltage V_(max)has said reference value estimated at 3.5 volts subject to an operatingcondition that a working temperature of each LED connecting pin iscontrolled at or below 80 degrees centigrade, accordingly said voltage Vacross each of said N pieces of LEDs complies with an operatingconstraint of 2.5 volts<V<3.5 volts and said working voltage V_(N)imposed on said LED load is thereby confined in a domain expressed byN×2.5 volts<V_(N)<N×3.5 volts.
 17. The linkable LED security lightaccording to claim 14, wherein said power supply unit is configured withan AC/DC power converter and a constant current control circuit toconvert an AC power into at least one DC power with said constantcurrent required for operating said linkable LED security light.
 18. Thelinkable LED security light according to claim 14, wherein said powersupply unit comprises a battery module to output at least one DC powerfor operating said linkable LED security light.
 19. The linkable LEDsecurity light according to claim 18, wherein said battery module is arechargeable battery module.
 20. The linkable LED security lightaccording to claim 19, wherein said rechargeable battery module is asolar battery module including a solar panel, a charging circuitry and arechargeable battery.
 21. The linkable LED security light according toclaim 14, wherein said wireless signal for operating said wirelessremote control device is a Wi-Fi wireless signal, a Blue Tooth wirelesssignal, a Zig Bee wireless signal, or a radio frequency wireless signal.22. The linkable LED security light according to claim 14, wherein saidfirst time setting device is designed to include a dusk to dawn option,wherein said first predetermined time duration is ended at dawn whensaid ambient light is higher than said second predetermined value toperform a dusk to dawn illumination of said first level illumination.23. The linkable LED security light according to claim 14, wherein saidlight intensity of said second level illumination is at least 1.5 timesof said light intensity of said first level illumination.
 24. A linkableLED security lighting system, configured with a plurality of LEDsecurity lights with each LED security light comprising at least: alight-emitting unit, including at least a first LED load configured witha plurality of LEDs emitting lights with a first color temperature; aswitching circuitry; a controller; a light sensing control unit; amotion sensing unit; a wireless signal transmitter a wireless signalreceiver; a first external control device; a second external controldevice; a first time setting device; and a second time setting device;wherein said controller is electrically coupled with said switchingcircuitry; wherein said switching circuitry is electrically connectedbetween a power source and said light-emitting unit to transmitdifferent electric powers to said light-emitting unit for operatingdifferent illumination modes controlled by said controller according tosignals respectively received from said light sensing control unit, saidmotion sensing unit, said wireless signal receiver, said first externalcontrol device, said second external control device, said first timesetting device and said second time setting device, wherein said powersource is a DC power outputting a constant current; wherein, at duskwhen an ambient light detected by said light sensing control unit islower than a first predetermined value, said controller operates tooutput a first control signal to conduct said switching circuitry with afirst conduction rate according to an operating parameter preset withsaid first external control device to operate a first level illuminationmode for performing a first level illumination for a first time lengthaccording to an operating parameter preset with said first time settingdevice; wherein said controller is designed with a process to activate asecond level illumination mode to perform a second level illuminationpreset with said second external control device upon receiving a motionsignal detected by said motion sensing unit or upon receiving a firstwireless signal thru said wireless signal receiver whichever occursfirst, wherein during said first level illumination mode when saidcontroller of an LED security light first receives said motion signal,said LED security light acts as a commanding LED security light toactivate said plurality of LED security lights to synchronously operatesaid second level illumination mode to perform said second levelillumination; wherein upon receiving said motion signal said controllerof said commanding LED security light operates to output a secondcontrol signal to conduct said switching circuitry with a secondconduction rate to activate said second level illumination mode toperform said second level illumination for a second time length presetwith said second time setting device, at the same time said controllerof said commanding LED security light operates to transmit said firstwireless signal thru said wireless signal transmitter of said commandingLED security light to remotely activate at least one neighboring memberLED security light in said linkable LED security lighting system tosynchronously operate said second level illumination mode for performingsaid second level illumination, wherein upon a maturity of said secondtime length with no new motion signal or no new said first wirelesssignal being further received said controller of said LED security lightoperates to resume said first level illumination; wherein at dawn whensaid ambient light detected by said light sensing control unit is higherthan a second predetermined value, said controller operates to cutoffsaid switching circuitry to turn off said LED security light in saidlinkable LED security lighting system; wherein said first LED load inconjunction with a level setting of said DC power is designed with acombination of said plurality of LEDs in series and/or in parallelconnections such that an electric current passing through each LED ofsaid first LED load remains at a level, and a voltage V across each LEDcomplies with a constraint of V_(th)<V<V_(max) featuring an electricalcharacteristic of said LED, wherein V_(th) is a reference value of athreshold voltage required to trigger each LED to emit light and V_(max)is a reference value of a maximum operating voltage across each LED atwhich at least one LED construction in said first LED load is vulnerableto a thermal damage.
 25. The linkable LED security lighting systemaccording to claim 24, wherein when said first LED load is configuredwith N pieces of LEDs electrically connected in series or N sets of inparallel connected LEDs electrically connected in series, a workingvoltage V_(N) imposed on said first LED load for driving said pluralityof LEDs is confined in a domain between a minimum voltage equal to atotal sum of said threshold voltages of said N pieces of LEDselectrically connected in series or said N sets of in parallel connectedLEDs electrically connected in series and a maximum voltage equal to atotal sum of said maximum operating voltages of said N pieces of LEDselectrically connected in series or said N sets of in parallel connectedLEDs electrically connected in series, expressed byN×V_(th)<V_(N)<N×V_(max).
 26. The linkable LED security lighting systemaccording to claim 25, wherein when the LED load is configured withwhite light LEDs produced by coating at least one phosphor compound onthe surfaces of blue light LEDs, said threshold voltage V_(th) has saidreference value estimated at 2.5 volts and said maximum operatingvoltage V_(max) has said reference value estimated at 3.5 volts subjectto an operating condition that a working temperature of each LEDconnecting pin is controlled at or below 80 degrees centigrade,accordingly said working voltage V_(N) is to be confined in a domainbetween N×2.5 volts and N×3.5 volts, expressed by N×2.5volts<V_(N)<N×3.5 volts.
 27. The linkable LED security lighting systemaccording to claim 24, wherein in each LED security light a first switchis electrically installed between said wireless signal transmitter andsaid controller to connect or disconnect said wireless signaltransmitter to said controller, and a second switch is electricallyinstalled between said wireless signal receiver and said controller toconnect or disconnect said wireless signal receiver to said controller;wherein when both said first switch and said second switch are in aconnected state, said LED security light is linkable to at least oneneighboring LED security light; wherein when both said first selectionswitch and said second selection switch are in a disconnected state,said LED security light is not linkable to any of said neighboring LEDsecurity lights and said LED security light is independently operated.28. The linkable LED security lighting system according to claim 24,wherein said first external control device, said second external controldevice, said first time setting device and said second time settingdevice are voltage dividers to respectively output different voltagesignals interpretable by said controller for selecting and settingoperating parameters of said LED security light.
 29. The linkable LEDsecurity lighting system according to claim 24, wherein said first timesetting device is designed to include a dusk to dawn option, whereinsaid first time length is ended at dawn when said ambient light detectedis higher than a second predetermined value to perform a dusk to dawnillumination of said first level illumination.
 30. The linkable LEDsecurity lighting system according to claim 24, wherein when said atleast one neighboring LED security light is remotely and wirelesslyactivated to operate said second level illumination mode for performingsaid second level illumination, said controller of said at least oneneighboring LED security light operates to conduct said switchingcircuitry according to said wireless signal received from said wirelesssignal receiver to perform same said second level illumination for samesaid second time length performed by said commanding LED security light.31. The linkable LED security lighting system according to claim 24,wherein when said at least one neighboring LED security light isremotely and wirelessly activated to operate said second levelillumination mode for performing said second level illumination, saidcontroller of said at least one neighboring LED security light managesto perform said second level illumination according to said operatingparameter preset.
 32. The linkable LED security lighting systemaccording to claim 24, wherein said controller is further designed tooperate a general illumination mode; wherein a short power interruptioncircuitry is electrically coupled to said controller for detecting ashort power interruption signal generated by operating a power switch toturn off and turn back on a power input to said LED security lightwithin a preset short time interval; wherein a third external controldevice and a third time setting device are electrically coupled withsaid controller; wherein when said controller of an LED security lightfirst receives said short power interruption signal, said controlleroperates to deactivate said motion sensing unit and activates saidgeneral illumination mode; wherein said controller outputs a thirdcontrol signal to conduct said switching circuitry to transmit anelectric power to said light-emitting unit according to an operatingparameter preset with said third external control device for said thirdtime length preset with said third time setting device for operatingsaid general illumination mode for performing a general illumination,wherein said controller simultaneously operates to wirelessly link atleast one neighboring LED security light thru said wireless signaltransmitter to synchronously activate said at least one neighboring LEDsecurity light to operate said general illumination mode for performingsaid general illumination.
 33. The linkable LED security lighting systemaccording to claim 32, wherein said third time length is designed to beended at dawn when said ambient light detected by said light sensingcontrol unit is higher than a second predetermined value.
 34. A linkableLED security lighting system, configured with a plurality of LEDsecurity lights with each LED security light comprising at least: alight-emitting unit, including at least a first LED load emitting lightwith a first color temperature; a switching circuitry; a controller; alight sensing control unit; a motion sensing unit; a wireless signaltransmitter; a wireless signal receiver; a first external controldevice; a second external control device; a first time setting device;and a second time setting device; wherein said controller iselectrically coupled with said switching circuitry; wherein saidswitching circuitry is electrically connected between a power source andsaid light-emitting unit, wherein said power source outputs a DC powerwith a constant current; wherein said switching circuitry comprises atleast a first semiconductor switching device, wherein said controlleroutputs a control signal to control a conduction rate of said switchingcircuitry for delivering different average electric powers from saidpower source to drive said light-emitting unit for generating differentilluminations characterized by different light intensities according tosignals respectively received from said light sensing control unit, saidmotion sensing unit, said wireless signal receiver, said first externalcontrol device, said second external control device, said first timesetting device and said second time setting device: wherein at dusk whena nighttime signal is detected thru said light sensing control unitindicating an ambient light being lower than a first predeterminedvalue, said controller operates to activate said motion sensing unit andoutput a first control signal to conduct said switching circuitry with afirst conduction rate according to an operating parameter preset withsaid first external control device to operate a first level illuminationmode for performing a first level illumination for a first time lengthpreset by said first time setting device; wherein said controller isdesigned to operate said first level illumination mode either accordingto said night time signal being detected or according to a detection ofa first wireless signal from said wireless signal receiver whicheveroccurs first; wherein at dusk when said controller of an LED securitylight in said linkable LED security lighting system first detects saidnighttime signal thru said light sensing control unit, said LED securitylight acts as a commanding LED security light to synchronously activatesaid plurality of LED security lights to operate said first levelillumination mode to perform said first level illumination; wherein saidcontroller operates to activate said first level illumination mode andat the same time said controller operates to wirelessly transmit saidfirst wireless signal thru said wireless signal transmitter to activateat least one neighboring LED security light in said linkable securitylighting system to synchronously operate said first level illuminationmode for performing said first level illumination for said first timelength; wherein during a performance of said first level illuminationmode when said controller of an LED security light in said linkable LEDsecurity lighting system first detects a motion signal from said motionsensing unit, said LED security light acts as a commanding LED securitylight to activate said plurality of LED security lights to synchronouslyoperate a second level illumination mode to perform a second levelillumination for a second time length preset by said second time settingdevice; wherein said controller of said commanding LED security lightoperates to output a second control signal to activate said second levelillumination mode to perform said second level illumination preset bysaid second external control device, at the same time said controlleroperates to wirelessly transmit a second wireless signal thru saidwireless signal transmitter to activate said at least one neighboringLED security light to synchronously operate said second levelillumination mode for performing said second level illumination for saidsecond time length, wherein upon a maturity of said second time lengthwith no new motion signal or no new said second wireless signal beingfurther detected said controller operates said LED security light toresume said first level illumination mode to perform said first levelillumination, wherein a light intensity of said second levelillumination is higher than a light intensity of said first levelillumination; wherein at dawn when an LED security light in saidlinkable LED security lighting system first detects a daytime signalindicating said ambient light detected thru said light sensing controlunit being higher than a second predetermined value, said LED securitylight acts as a commanding LED security light to synchronouslydeactivate said plurality of LED security lights in said linkable LEDsecurity lighting system, wherein said controller of said LED securitylight operates to stop outputting said first control signal and saidsecond control signal to turn off said light-emitting unit, at the sametime said controller operates to wirelessly transmit a third wirelesssignal thru said wireless signal transmitter to deactivate said at leastone neighboring LED security light to turn off said light-emitting unitof said at least one neighboring LED security light; wherein said firstLED load in conjunction with a level setting of said DC power isdesigned with a combination of said plurality of LEDs in series and/orin parallel connections such that an electric current passing througheach LED of said LED load remains at a level, and a voltage V acrosseach LED complies with a constraint of V_(th)<V<V_(max) featuring anelectrical characteristic of each LED, wherein V_(th) is a referencevalue of a threshold voltage required to trigger each LED to emit lightand V_(max) is a reference value of a maximum operating voltage acrosseach LED at which at least one LED construction in said first LED loadis vulnerable to a thermal damage.
 35. The linkable LED securitylighting system according to claim 34, wherein when said first LED loadis configured with N pieces of LEDs electrically connected in series orN sets of in parallel connected LEDs electrically connected in series, aworking voltage V_(N) imposed on said LED load is confined in a domainbetween a minimum voltage equal to a total sum of said thresholdvoltages of said N pieces of LEDs electrically connected in series orsaid N sets of in parallel connected LEDs electrically connected inseries and a maximum voltage equal to a total sum of said maximumoperating voltages of said N pieces of LEDs electrically connected inseries or said N sets of in parallel connected LEDs electricallyconnected in series, expressed by N×V_(th)<V_(N)<N×V_(max).
 36. Thelinkable LED security lighting system according to claim 35, whereinwhen the LED load is configured with white light LEDs produced bycoating at least one phosphor compound on the surfaces of blue lightLEDs, said threshold voltage V_(th) has said reference value estimatedat 2.5 volts and said maximum operating voltage V_(max) has saidreference value estimated at 3.5 volts subject to an operating conditionthat a working temperature of each LED connecting pin is controlled ator below 80 degrees centigrade, accordingly said working voltage V_(N)is to be confined in a domain between N×2.5 volts and N×3.5 volts,expressed by N×2.5 volts<V_(N)<N×3.5 volts.
 37. The linkable LEDsecurity lighting system according to claim 34, wherein a firstselection switch is electrically installed between said wireless signaltransmitter and said controller to connect or disconnect said wirelesssignal transmitter to said controller, and a second selection switch iselectrically installed between said wireless signal receiver and saidcontroller to connect or disconnect said wireless signal receiver tosaid controller; wherein when both said first selection switch and saidsecond selection switch are in a connected state, said LED securitylight is linkable to at least one neighboring LED security light;wherein when both said first selection switch and said second selectionswitch are in a disconnected state, said LED security light is notlinkable to any of said neighboring LED security lights and said LEDsecurity light is independently operated; wherein when said firstselection switch is electrically connected to said controller while saidsecond selection switch being disconnected said LED security light isable to remotely and synchronously control a lighting performance of atleast one linked neighboring LED security light in the linkable LEDsecurity lighting system; wherein when said second selection switch iselectrically connected to said controller while said first selectionswitch being disconnected, said LED security light can be synchronouslyand remotely activated to operate a lighting performance by at least onelinked neighboring LED security light in the linkable LED securitylighting system.
 38. The linkable LED security lighting system accordingto claim 34, wherein said first external control device, said secondexternal control device, said first time setting device and said secondtime setting device are voltage dividers to respectively outputdifferent voltage signals interpretable by said controller for selectingand setting operating parameters of said first conduction rate, saidsecond conduction rate, said first time length and said second timelength.
 39. The linkable LED security lighting system according to claim34, wherein said first time length is designed to be ended at dawn whenan ambient light detected by said light sensing control unit is higherthan said second predetermined value to perform a dusk to dawnillumination of said first level illumination.
 40. The linkable LEDsecurity lighting system according to claim 34, wherein said controlleris further designed to operate a general illumination mode; wherein ashort power interruption circuitry is electrically coupled to saidcontroller for detecting a short power interruption signal generated byoperating a power switch to turn off and turn back on a power input tosaid LED security light within a preset short time interval; wherein athird external control device and a third time setting device areelectrically coupled with said controller; wherein when said controllerof an LED security light first receives said short power interruptionsignal, said controller operates to deactivate said motion sensing unitand activates said general illumination mode; wherein said controlleroutputs a third control signal to conduct said controllable switchingcircuitry to transmit an electric power to said light-emitting unitaccording to an operating parameter preset with said third externalcontrol device for said third time length preset with said third timesetting device for operating said general illumination mode forperforming a general illumination, wherein said controllersimultaneously operates to wirelessly link at least one neighboring LEDsecurity light thru said wireless signal transmitter to synchronouslyactivate said at least one neighboring LED security light to operatesaid general illumination mode for performing said general illumination.41. The linkable LED security lighting system according to claim 40,wherein said third time length is designed to be ended at dawn when saidambient light detected by said light sensing control unit is higher thansaid second predetermined value.
 42. The linkable LED security lightingsystem according to claim 34, wherein said first conduction rate isadjustable in a range with value between 0% and 50% of a maximumelectric power conduction; wherein when said first conduction rate isset at 0%, said first level illumination is vanished and said linkableLED security lighting system becomes a single level LED securitylighting system; wherein when said first conduction rate is adjusted toany positive number in a range between said 0% and 50%, namely 0%<R₁≤50%, wherein R₁ represents a value of said first conduction rate, saidlinkable LED security lighting system is a two-level LED securitylighting system with said light intensity of said first levelillumination correspondingly varying in a range between 0 and half ofsaid light intensity of said second level illumination, namely 0<I₁≤50%of I₂, wherein I₁ represents said light intensity of said first levelillumination and I₂ represent said light intensity of said second levelillumination.
 43. A linkable LED security lighting system, configuredwith a plurality of LED security lights with each LED security lightcomprising: a light-emitting unit, configured with an LED load; aswitching circuitry, electrically connected between a power source andsaid light-emitting unit for delivering at least one DC power to saidlight-emitting unit, for performing at least a first level illumination;a controller, designed to operate at least a first level illuminationmode; wherein said controller outputs a first control signal to conductsaid switching circuitry with a first conduction rate to deliver a firstelectric power to said light-emitting unit to perform said first levelillumination; a light sensing control unit, electrically coupled to saidcontroller for detecting an ambient light level and accordinglyoutputting a nighttime signal when said ambient light level detectedbeing lower than a first predetermined value or a daytime signal whensaid ambient light level detected being higher than a secondpredetermined value; a wireless signal transmitter, electrically coupledto said controller to wirelessly transmit a first wireless signal tosynchronously control at least one neighboring LED security light toactivate said first level illumination mode to perform the first levelillumination and to wirelessly transmit a second wireless signal tosynchronously deactivate said first level illumination mode of said atleast one neighboring LED security light to turn off said first levelillumination; and a wireless signal receiver, electrically coupled tosaid controller for receiving said first wireless signal tosynchronously activate said first level illumination mode to performsaid first level illumination and for receiving said second wirelesssignal to turn off said first level illumination; wherein at dusk whensaid controller of an LED security light of said plurality of LEDsecurity lights first detects said nighttime signal, said LED securitylight acts as a commanding LED security light to synchronously activatesaid plurality of LED security lights to perform said first levelillumination, wherein said controller of said commanding LED securitylight operates to output said first control signal to conduct saidswitching circuitry with said first conduction rate to perform saidfirst level illumination, at the same time said controller of saidcommanding LED security light operates to transmit said first wirelesssignal to said at least one neighboring LED security light thru saidwireless signal transmitter to synchronously activate said at least oneneighboring LED security light in the linkable LED security lightingsystem to perform said first level illumination; wherein at dawn when anLED security light in said linkable LED security lighting system firstdetects said daytime signal, said controller of said LED security lightacts as a commanding LED security light to synchronously deactivate saidplurality of LED security lights to turn off said first levelillumination; wherein said controller of said commanding LED securitylight operates to deactivate said first level illumination mode to turnoff said first level illumination, at the same time said controller ofsaid commanding LED security light operates to transmit said secondwireless signal to said at least one neighboring LED security light inthe linkable LED security lighting system thru said wireless signaltransmitter to synchronously deactivate said first level illuminationmode and turn off said first level illumination of said at least oneneighboring LED security light; wherein said LED load in conjunctionwith a level setting of said DC power is designed with a combination ofsaid plurality of LEDs in series and/or in parallel connections suchthat an electric current passing through each LED of said LED loadremains at a level, and a voltage V across each LED complies with aconstraint of V_(th)<V<V_(max) featuring an electrical characteristic ofeach LED; wherein V_(th) is a reference value of a threshold voltagerequired to trigger each LED to emit light and V_(max) is a referencevalue of a maximum operating voltage across each LED at which at leastone LED in said LED load is vulnerable to a thermal damage.
 44. Thelinkable LED security lighting system according to claim 43, whereinwhen said first LED load is configured with N pieces of LEDselectrically connected in series or N sets of in parallel connected LEDselectrically connected in series, a working voltage V_(N) imposed onsaid LED load is confined in a domain between a minimum voltage equal tothe total sum of said threshold voltages of said N pieces of LEDselectrically connected in series or said N sets of in parallel connectedLEDs electrically connected in series and a maximum voltage equal to thetotal sum of said maximum operating voltages of said N pieces of LEDs orsaid N sets of in parallel connected LEDs electrically connected inseries, expressed by N×V_(th)<V_(N)<N×V_(max).
 45. The linkable LEDsecurity lighting system according to claim 44, wherein when the LEDload is configured with white light LEDs produced by coating at leastone phosphor compound on the surfaces of blue light LEDs, said thresholdvoltage V_(th) has said reference value estimated at 2.5 volts and saidmaximum operating voltage V_(max) has said reference value estimated at3.5 volts subject to an operating condition that a working temperatureof each LED connecting pin is controlled at or below 80 degreescentigrade, accordingly said working voltage V_(N) is to be confined ina domain between N×2.5 volts and N×3.5 volts, expressed by N×2.5volts<V_(N)<N×3.5 volts.
 46. An APP (software application) basedlinkable security lighting system, configured with a plurality of LEDsecurity lights with each LED security light comprising: alight-emitting unit, including an LED load; a switching circuitry; acontroller; a light sensing control unit, electrically coupled to saidcontroller for detecting an ambient light level and accordinglyoutputting a nighttime signal when said ambient light level detectedbeing lower than a first predetermined value or a daytime signal whensaid ambient light level detected being higher than a secondpredetermined value; a motion sensing unit to detect a motion intrusionand accordingly to output a motion signal to said controller; a wirelesssignal transmitter, electrically coupled to said controller to transmitwireless control signals comprising instruction codes, said wirelesscontrol signals including a first instruction signal triggered by saidnighttime signal, a second instruction signal triggered by said motionsignal and a third instruction signal triggered by said daytime signalfor communications within said APP (software application) based linkablesecurity lighting system; a wireless signal receiver, electricallycoupled to said controller for receiving said wireless control signalsprefixed with identification codes including said first instructionsignal, said second instruction signal and said third instruction signalfor communications within said APP (software application) based linkablesecurity lighting system; a first time setting device electricallycoupled to said controller; and a second time setting deviceelectrically coupled to said controller; wherein said controller iselectrically coupled with said switching circuitry; wherein saidswitching circuitry is electrically connected between a power source andsaid light-emitting unit to transmit different electric powers to saidlight-emitting unit for operating different illumination modescontrolled by said controller according to signals respectively receivedfrom said light sensing control unit, said motion sensing unit, saidwireless signal receiver, said first time setting device and said secondtime setting device; wherein a connectivity APP (software application)is loaded in a mobile device, wherein said connectivity APP (softwareapplication) is an interface between a user of said mobile device andsaid linkable security lighting system, and is designed to enable saiduser to control lighting performances of said linkable security lightingsystem; wherein said connectivity APP (software application) isconfigured with two setting processes, wherein a first setting processis to establish a data base of installed locations for all of saidplurality of LED security lights with each of said plurality of LEDsecurity lights being assigned a location code based on its installedlocation for identification and for individual control thru saidconnectivity APP (software application), wherein a second settingprocess is a grouping job to divide said plurality of LED securitylights into at least one group of linkable LED security lights with eachgroup being assigned a group code applicable to each LED security lightin the same group for identification and for synchronously performingsame illumination function, wherein said grouping job includes an optionof composing all of said plurality of LED security lights in one groupwith each LED security light being assigned at least one universal codeto synchronously control lighting performances of all LED securitylights in said linkable security lighting system; wherein when saidconnectivity APP (software application) is wirelessly and individuallyconnected with each LED security light of said plurality of LED securitylights by turns, an item identification code of each LED security lightis received, saved and assigned a pairing location code by saidconnectivity APP (software application) based on its installed location;wherein upon completion of said by turn connection, said data base isthereby established for communications between said controller of eachLED security light in said linkable security lighting system and saidconnectivity APP (software application) for controlling various lightingperformances, wherein said location code, said group code and/or said atleast one universal code are stored in said connectivity APP (softwareapplication) of said mobile device and in a memory unit of saidcontroller of each LED security light; wherein after said data base ofinstalled locations for said plurality of LED security lights beingfully established each LED security light displayed visually on a screenof said mobile device becomes identifiable on said connectivity APP(software application) to said user to perform a grouping or re-groupingjob, wherein said location code is used for controlling only individualLED security light, wherein said group code is used for synchronouslycontrolling all LED security lights in the same group, wherein said atleast one universal code is used for synchronously controlling all LEDsecurity lights in said linkable security lighting system; wherein saidcontroller is designed with a software program to verify said wirelesscontrol signals received from said wireless signal receiver, wherein ifsaid wireless control signal comprising an instruction code is identicalto one of said location code, said at least one group code or said atleast one universal code in said memory unit, said controller operatesto process said wireless control signal to activate a correspondingillumination performance according to said wireless control signal beingsaid first instruction signal, said second instruction signal or saidthird instruction signal; wherein said controller is designed toactivate said LED security light either according to said nighttimesignal being detected by said light sensing control unit or according toa detection of said first instruction signal received from said wirelesssignal receiver whichever occurs first; wherein at dusk when saidcontroller of an LED security light of said plurality of LED securitylights first detects said nighttime signal from said light sensingcontrol unit, said LED security light acts as a commanding LED securitylight to synchronously activate said plurality of LED security lights tooperate a first level illumination mode to perform a first levelillumination for a first time length preset by said first time settingdevice and to activate said motion sensing units of all neighboring LEDsecurity lights in said linkable security lighting system; wherein saidcontroller of said commanding LED security light operates to activatesaid first level illumination mode to perform said first levelillumination for said first time length and to activate said motionsensing unit, at the same time said controller of said commanding LEDsecurity light operates to wirelessly transmit said first instructionsignal with a first universal code to all neighboring LED securitylights thru said wireless signal transmitter to activate all neighboringLED security lights to synchronously operate said first levelillumination mode for performing said first level illumination for saidfirst time length and to activate said motion sensing units of saidneighboring LED security lights; wherein during a performance of saidfirst level illumination mode when said controller of an LED securitylight of the plurality of LED security lights first detects said motionsignal from said motion sensing unit, said LED security light acts as acommanding LED security light to activate said LED security lights inthe same group to synchronously operate a second level illumination modeto perform a second level illumination for a second time length presetwith said second time setting device, wherein a light intensity of saidsecond level illumination is at least twice of a light intensity of saidfirst level illumination; wherein said controller of said commanding LEDsecurity light operates to activate said second level illumination modeto perform said second level illumination for said second time lengthpreset with said second time setting device, at the same time saidcontroller of said commanding LED security light operates to wirelesslytransmit said second instruction signal with said at least one groupcode to activate at least one neighboring LED security light tosynchronously operate said second level illumination mode for performingsaid second level illumination for said second time length, wherein upona maturity of said second time length with no new motion signal or nonew said second instruction signal being further detected saidcontroller operates to resume said first level illumination mode;wherein at dawn when said controller of an LED security light in saidAPP (software application) based linkable security lighting system firstreceives said daytime signal from said light sensing control unit, saidLED security light acts as a commanding LED security light tosynchronously deactivate said plurality of LED security lights, whereinsaid controller of said commanding LED security light operates to turnoff said light-emitting unit, at the same time said controller operatesto wirelessly transmit said third instruction signal with a seconduniversal code identifiable and executable by all neighboring LEDsecurity lights thru said wireless signal transmitter to deactivate andturn off all neighboring LED security lights.
 47. The APP (softwareapplication) based linkable security lighting system according to claim46, wherein said first time length is designed to be ended at dawn whensaid daytime signal is outputted by said light sensing control unit. 48.The APP (software application) based linkable security lighting systemaccording to claim 46, wherein said controller is further designed tooperate a general illumination mode; wherein a short power interruptioncircuitry is electrically coupled to said controller for detecting ashort power interruption signal generated by operating a power switch toturn off and turn back on a power input to said LED security lightwithin a preset short time interval; wherein a third time setting deviceis electrically coupled with said controller; wherein when saidcontroller of an LED security light first receives said short powerinterruption signal, said controller operates to deactivate said motionsensing unit and activates said general illumination mode; wherein saidcontroller controls an electric power transmitting to saidlight-emitting unit for a third time length preset with said third timesetting device for operating said general illumination mode forperforming a general illumination, wherein said controllersimultaneously operates to wirelessly link at least one neighboring LEDsecurity light thru said wireless signal transmitter to synchronouslyactivate said at least one neighboring LED security light to operatesaid general illumination mode for performing said general illumination.49. An APP (software application) based linkable security lightingsystem, configured with a plurality of LED security lights with each LEDsecurity light comprising: a light-emitting unit, including an LED load;a switching circuitry; a controller; a light sensing control unit,electrically coupled to said controller for detecting an ambient lightlevel and accordingly outputting a nighttime signal when said ambientlight level detected being lower than a first predetermined value or adaytime signal when said ambient light level detected being higher thana second predetermined value; a motion sensing unit, to detect a motionintrusion and accordingly to output a motion signal to said controller;a wireless signal transmitter, electrically coupled to said controllerto transmit wireless control signals comprising instruction codes, saidwireless control signals including a first instruction signal triggeredby said nighttime signal, a second instruction signal triggered by saidmotion signal and a third instruction signal triggered by said daytimesignal for communication within said APP (software application) basedlinkable security lighting system; a wireless signal receiver,electrically coupled to said controller for receiving said wirelesscontrol signals including said first instruction signal, said secondinstruction signal and said third instruction signal for communicationswithin said APP (software application) based linkable security lightingsystem; and a first time setting device, electrically coupled to saidcontroller; wherein said controller is electrically coupled with saidswitching circuitry; wherein said switching circuitry is electricallyconnected between a power source and said light-emitting unit totransmit different electric powers to said light-emitting unit foroperating different illumination modes controlled by said controlleraccording to signals respectively received from said light sensingcontrol unit, said motion sensing unit, said wireless signal receiver,and said first time setting device; wherein a connectivity APP (softwareapplication) is loaded in a mobile device, wherein said connectivity APP(software application) is configured with two setting processes, whereina first setting process is to establish a data base of installedlocations for all of said plurality of LED security lights with each ofsaid plurality of LED security lights being assigned a location code foridentification and for individual control, wherein a second settingprocess is a grouping job to divide said plurality of LED securitylights into at least one group of linkable LED security lights with eachgroup being assigned a group code applicable to each LED security lightin the same group for identification and for synchronously performingsame illumination function; wherein when said connectivity APP (softwareapplication) is wirelessly and individually connected with each LEDsecurity light of said plurality of LED security lights by turns, anitem identification code of each LED security light is received, savedand assigned a pairing location code by said connectivity APP (softwareapplication) based on its installed location; wherein upon completion ofsaid by turn connection, said data base is thereby established forcommunications between said controller of each LED security light insaid linkable security lighting system and said connectivity APP(software application) for controlling various lighting performances,wherein said location code, said group code and/or said at least oneuniversal code are stored in said connectivity APP (softwareapplication) of said mobile device and in a memory unit of saidcontroller of each LED security light; wherein after said data base ofinstalled locations for said plurality of LED security lights beingfully established each LED security light displayed visually on a screenof said mobile device becomes identifiable on said connectivity APP(software application) to said user to perform a grouping or re-groupingjob, wherein said location code is used for controlling only individualLED security light, wherein said group code is used for synchronouslycontrolling all LED security lights in the same group, wherein said atleast one universal code is used for synchronously controlling all LEDsecurity lights in said linkable security lighting system; wherein saidcontroller is designed with a software program to verify said wirelesscontrol signals received from said wireless signal receiver, wherein ifsaid wireless control signal with said instruction code is identical toone of said location code, said group code or said at least oneuniversal code in said memory unit, said controller operates to processsaid wireless control signal to activate a corresponding illuminationperformance according to said wireless control signal being said firstinstruction signal, said second instruction signal or said thirdinstruction signal; wherein said controller is designed to activate saidLED security light either according to said nighttime signal beingdetected or according to a detection of said first instruction signalfrom said wireless signal receiver whichever occurs first; wherein atdusk when said controller of an LED security light of said plurality ofLED security lights first detects said nighttime signal from said lightsensing control unit, said LED security light acts as a commanding LEDsecurity light to synchronously activate said plurality of LED securitylights to operate a motion detection mode; wherein said controlleroperates to activate said motion sensing unit of said commanding LEDsecurity light to operate said motion detection mode, and at the sametime said controller operates to wirelessly transmit said firstinstruction signal with a first universal code to said controllers ofall neighboring LED security lights thru said wireless signaltransmitter to activate each neighboring LED security light to operatesaid motion detection mode; wherein whenever said motion detection modeis activated, if said controller of an LED security light of a linkablegroup first detects a motion signal, said LED security light acts as acommanding LED security light to activate said LED security lights insaid linkable group to synchronously operate a second level illuminationmode to perform a second level illumination; wherein said controller ofsaid commanding LED security light operates to activate said secondlevel illumination mode to perform said second level illumination for afirst time length preset with said first time setting device, at thesame time said controller of said commanding LED security light operatesto wirelessly transmit said second instruction signal with said groupcode identifiable and executable by said controller of at least oneneighboring LED security light to synchronously operate said secondlevel illumination mode for performing said second level illuminationfor said first time length preset with said first time setting device;wherein upon a maturity of said first time length with no new motionsignal or no said second instruction signal being further detected saidcontroller operates said LED security light to resume said motiondetection mode; wherein at dawn when said controller of an LED securitylight in said APP (software application) based linkable securitylighting system first receives said daytime signal from said lightsensing control unit, said LED security light acts as a commanding LEDsecurity light to synchronously deactivate said plurality of LEDsecurity lights, wherein said controller of said commanding LED securitylight operates to turn off said light-emitting unit, at the same timesaid controller operates to wirelessly transmit said third instructionsignal with a second universal code identifiable and executable by eachcontroller of all neighboring LED security lights.
 50. The APP (softwareapplication) based linkable security lighting system according to claim49, wherein said controller is further designed to operate a generalillumination mode; wherein a short power interruption circuitry iselectrically coupled to said controller for detecting a short powerinterruption signal generated by operating a power switch to turn offand turn back on a power input to said LED security light within apreset short time interval; wherein a second time setting device iselectrically coupled with said controller; wherein when said controllerof an LED security light first receives said short power interruptionsignal, said controller operates to deactivate said motion sensing unitand activates said general illumination mode; wherein said controllercontrols an electric power transmitted to said light-emitting unit for asecond time length preset with said second time setting device foroperating said general illumination mode for performing a generalillumination, wherein said controller simultaneously operates towirelessly link at least one neighboring LED security light thru saidwireless signal transmitter to synchronously activate said at least oneneighboring LED security light to operate said general illumination modefor performing said general illumination.
 51. An APP (softwareapplication) based linkable security lighting system, configured with aplurality of LED security lights with each LED security lightcomprising: a light-emitting unit, including an LED load; a switchingcircuitry; a controller; a light sensing control unit, electricallycoupled to said controller for detecting an ambient light level andaccordingly outputting a nighttime signal when said ambient light leveldetected being lower than a first predetermined value or a daytimesignal when said ambient light level detected being higher than a secondpredetermined value; a motion sensing unit to detect a motion intrusionand accordingly to output a motion signal to said controller; a wirelesssignal transmitter, electrically coupled to said controller to transmitwireless control signals comprising instruction codes, said wirelesscontrol signals including a first instruction signal triggered by saidnighttime signal, a second instruction signal triggered by said motionsignal and a third instruction signal triggered by said daytime signalfor communications within said APP (software application) based linkablesecurity lighting system; a wireless signal receiver, electricallycoupled to said controller for receiving said wireless control signalsincluding said first instruction signal, said second instruction signaland said third instruction signal for communications within said APP(software application) based linkable security lighting system; a firsttime setting device electrically coupled to said controller; and asecond time setting device electrically coupled to said controller;wherein said controller is electrically coupled with said switchingcircuitry; wherein said switching circuitry is electrically connectedbetween a power source and said light-emitting unit to transmitdifferent electric powers to said light-emitting unit for operatingdifferent illumination modes controlled by said controller according tosignals respectively received from at least said light sensing controlunit, said motion sensing unit, said wireless signal receiver, saidfirst time setting device and said second time setting device; wherein aconnectivity APP (software application) is loaded in a mobile device,wherein said connectivity APP (software application) is an interfacebetween a user of said mobile device and said linkable security lightingsystem, and is designed to enable said user to control lightingperformances of said linkable security lighting system; wherein saidconnectivity APP (software application) is configured with two settingprocesses, wherein a first setting process is to establish a data baseof installed locations for all of said plurality of LED security lightswith each of said plurality of LED security lights being assigned alocation code based on its installed location for identification and forindividual control thru said connectivity APP (software application),wherein a second setting process is a grouping job to divide saidplurality of LED security lights into at least one group of linkable LEDsecurity lights with each group being assigned a group code applicableto each LED security light in the same group for identification and forsynchronously performing same illumination function, wherein saidgrouping job includes an option of composing all of said plurality ofLED security lights in one group with each LED security light beingassigned at least one universal code to synchronously control lightingperformances of all LED security lights in said linkable securitylighting system; wherein when said connectivity APP (softwareapplication) is wirelessly and individually connected with each LEDsecurity light of said plurality of LED security lights by turns an itemidentification code of each LED security light is received, saved andassigned a pairing location code by said connectivity APP (softwareapplication) based on its installed location; wherein upon completion ofsaid by turn connection, said data base is thereby established forcommunications between said controller of each LED security light insaid linkable security lighting system and said connectivity APP forcontrolling various lighting performances; wherein said location code,said group code and/or said at least one universal code are stored insaid connectivity APP (software application) of said mobile device andin a memory unit of said controller of each LED security light; whereinafter said data base of installed locations for said plurality of LEDsecurity lights being fully established each LED security lightdisplayed visually on a screen of said mobile device becomesidentifiable on said connectivity APP (software application) to saiduser to perform a grouping or re-grouping job, wherein said locationcode is used for controlling only an individual LED security light,wherein said group code is used for synchronously controlling all LEDsecurity lights in the same group, wherein said at least one universalcode is used for synchronously controlling all LED security lights insaid linkable security lighting system; wherein said controller isdesigned with a software program to verify said wireless control signalreceived from said wireless signal receiver, wherein if said wirelesscontrol signal is identical to one of said location code, said at leastone group code or said at least one universal code in said memory unit,said controller operates to process said wireless control signal toactivate a corresponding illumination performance according to saidwireless control signal being said first instruction signal, said secondinstruction signal or said third instruction signal; wherein saidcontroller is designed to activate said LED security light eitheraccording to said nighttime signal being detected by said light sensingcontrol unit or according to a detection of said first instructionsignal received from said wireless signal receiver whichever occursfirst; wherein at dusk when said controller of an LED security light ofsaid plurality of LED security lights first detects said nighttimesignal from said light sensing control unit, said LED security lightacts as a commanding LED security light to synchronously activate saidplurality of LED security lights to operate a first level illuminationmode to perform a first level illumination for a first time lengthpreset by said first time setting device with said motion sensing unitsof said plurality of LED security lights in said linkable securitylighting system remaining deactivated; wherein said controller of saidcommanding LED security light operates to activate said first levelillumination mode to perform said first level illumination for saidfirst time length, at the same time said controller of said commandingLED security light operates to wirelessly transmit said firstinstruction signal with a first universal code to all neighboring LEDsecurity lights thru said wireless signal transmitter to activate allneighboring LED security lights to synchronously operate said firstlevel illumination mode for performing said first level illumination forsaid first time length; wherein upon a maturity of said first timelength said controller of each LED security light operates to turn offsaid LED security light and at the same time to activate said motionsensing unit of each LED security light to operate a motion sensingmode; wherein during said motion sensing mode when said controller of anLED security light of the plurality of LED security lights first detectssaid motion signal from said motion sensing unit, said LED securitylight acts as a commanding LED security light to activate said LEDsecurity lights in the same group to synchronously operate a secondlevel illumination mode to perform a second level illumination for asecond time length preset with said second time setting device; whereinsaid controller of said commanding LED security light operates toperform said second level illumination for said second time lengthpreset with said second time setting device, at the same time saidcontroller of said commanding LED security light operates to wirelesslytransmit said second instruction signal with said at least one groupcode to activate at least one neighboring LED security light tosynchronously perform said second level illumination for said secondtime length, wherein upon a maturity of said second time length with nonew motion signal or no said second instruction signal being furtherdetected said controller operates to resume said motion sensing modepending for a new motion signal, wherein a light intensity of saidsecond level illumination is equal to or higher than a light intensityof said first level illumination; wherein at dawn when said controllerof an LED security light in said APP (software application) basedlinkable security lighting system first receives said daytime signalfrom said light sensing control unit, said LED security light acts as acommanding LED security light to synchronously deactivate said pluralityof LED security lights in said linkable security lighting system,wherein said controller of said commanding LED security light operatesto turn off said light-emitting unit, at the same time said controlleroperates to wirelessly transmit said third instruction signal with asecond universal code interpretable and executable by all neighboringLED security lights thru said wireless signal transmitter to deactivateand turn off all neighboring LED security lights.
 52. A method ofconfiguring a linkable LED security lighting system configured with aplurality of LED security lights, comprising: using a connectivity APP(software application) loaded in a mobile device wirelessly connectableto said plurality of LED security lights to operate two settingprocesses including a first setting process for generating a data baseof installed locations for all of said plurality of LED security lightswith each of said plurality of LED security lights being assigned alocation code for identification and for individual performance control,and a second setting process for operating a grouping job to divide saidplurality of LED security lights into at least one group of linkable LEDsecurity lights with each group being assigned a group code applicableto each LED security light in the same group for identification and forsynchronously performing same illumination function; wherein foractivating said first setting process said connectivity APP (softwareapplication) is wirelessly and individually connected to each of saidplurality of LED security lights to respectively generate a firstwireless setting signal to each of said plurality of LED security lightsto assign a location code by turns according to a location ofinstallation of each of said plurality of LED security lights; whereinupon a completion of said first setting process for establishing saiddatabase of installed location each LED security light displayedvisually on a screen of said mobile device becomes identifiable on saidconnectivity APP (software application) for a user to perform agrouping, regrouping or to control individual lighting performance ofeach LED security light; wherein said connectivity APP operates toactivate said second setting process to generate at least one secondwireless setting signal transmitted to each of a selected number of LEDsecurity lights classified in the same group for assigning a group codefor operating a synchronous lighting performance for said LED securitylights in the same group; wherein upon a completion of said secondsetting process for said grouping job said connectivity APP (softwareapplication) operates to generate at least a third wireless settingsignal to each of said plurality of LED security lights for assigning atleast one universal code to synchronously operate same lightingperformance, wherein said location code is used for controlling only oneindividual LED security light, wherein said group code is used forcontrolling all LED security lights in the same group, wherein said atleast one universal code is used for controlling all LED security lightsin said linkable LED security lighting system; using a controllerelectrically coupled with a switching circuitry electrically connectedbetween a power source and an LED load in each LED security light, tooperate at least a first level illumination mode; wherein for activatingsaid first level illumination mode said controller outputs at least afirst control signal to control said switching circuitry to deliver afirst level electric power to said LED load for performing a first levelillumination for a first time length; using a software program designedin said controller of each LED security light to receive, process andmemorize in a memory unit said location code set by said first wirelesssetting signal, said group code set by said second wireless settingsignal and said at least one universal code set by said third wirelesssetting signal wirelessly transmitted from said mobile device generatedby said connectivity APP (software application) to be used foridentifying and verifying an instruction signal from a neighboring LEDsecurity light to responsively and synchronously operate sameillumination function being performed by said neighboring LED securitylight; using a light sensing control unit electrically coupled with saidcontroller in each LED security light to detect an ambient light leveland accordingly outputting a nighttime signal when said ambient lightlevel detected is lower than a first predetermined value or a daytimesignal when said ambient light level detected is higher than a secondpredetermined value; using a motion sensing unit electrically coupledwith said controller in each LED security light to detect a motionintrusion and accordingly to output a motion signal; using a wirelesssignal transmitter electrically coupled with said controller in each LEDsecurity light to wirelessly transmit at least one instruction signalwith said group code or with said universal code interpretable andexecutable by said controller of each neighboring LED security light tosynchronously operate same illumination performance; using a wirelesssignal receiver, electrically coupled to said controller for receivingat least two types of wireless external control signals interpretableand executable by said controller, wherein a first type of wirelessexternal control signals are said first wireless setting signal forassigning said location code, said second wireless setting signal forassigning said group code and said third wireless setting signal forassigning said at least one universal code generated by and transmittedfrom said connectivity APP (software application) of said mobile deviceto be processed and memorized in said memory unit by said controller ofeach LED security light; wherein a second type of wireless externalcontrol signal is said at least one instruction signal with said groupcode or said at least one universal code transmitted from at least oneneighboring LED security light interpretable and executable by saidcontroller for operating the same illumination mode being operated bysaid at least one neighboring LED security light; wherein at dusk whensaid controller of an LED security light first receives said nighttimesignal from said light sensing control unit, said LED security lightacts as a commanding LED security light to synchronously activate saidplurality of LED security lights to operate a motion sensing mode toperform a motion detection; wherein said controller operates to activatesaid motion sensing unit of said commanding LED security light tooperate said motion sensing mode, at the same time said controlleroperates to wirelessly transmit a first instruction signal with a firstuniversal code to said controllers of all neighboring LED securitylights thru said wireless signal transmitter to activate eachneighboring LED security light to operate said motion sensing mode;wherein when said controller of an LED security light first receivessaid motion signal from said motion sensing unit, said LED securitylight acts as a commanding LED security light to synchronously activatesaid LED security lights in said linkable group to operate said firstlevel illumination mode to perform said first level illumination forsaid first time length; wherein said controller operates to activatesaid first level illumination mode of said commanding LED security lightto perform said first level illumination for said first time length andat the same time said controller operates to wirelessly transmit asecond instruction signal with said group code interpretable andexecutable by said controller of all neighboring LED security lightsthru said wireless signal transmitter to synchronously operate saidfirst level illumination mode to perform said first level illuminationfor said first time length; wherein upon a maturity of said first timelength with no new motion signal or no said second instruction signalbeing further detected, said controller operates to terminate said firstlevel illumination mode and accordingly all of said LED security lightsare switched to resume said motion sensing mode; wherein at dawn whensaid controller of said LED security light first receives said daytimesignal thru said light sensing control unit, said LED security lightacts as a commanding LED security light to deactivate said plurality ofLED security lights, wherein said controller operates to terminate saidmotion sensing mode to deactivate said LED security light, at the sametime said controller operates to wirelessly transmit a third instructionsignal with a second universal code interpretable and executable by eachcontroller of all neighboring LED security lights thru said wirelesssignal transmitter to deactivate and turn off all neighboring LEDsecurity lights.
 53. An APP (software application) based setting method,for wirelessly selecting and exclusively controlling a functionalperformance of an individual LED lighting device or a group of selectedLED lighting devices in an LED lighting system configured with aplurality of LED lighting devices, comprising: using a connectivity APP(software application) loaded in a mobile device to perform two settingprocesses including a first setting process for generating a data baseof installed locations for all of said plurality of lighting deviceswith each of said plurality of lighting devices being assigned alocation code for identification and for individual performance control,and a second setting process for performing a grouping job to establishat least one group of linkable lighting devices with said at least onegroup of linkable lighting devices being assigned a group codeapplicable to each lighting device in said at least one group foridentification and for synchronously performing same illuminationfunction, wherein for activating said first setting process saidconnectivity APP (software application) is wirelessly and individuallyconnected to each of said plurality of LED lighting devices torespectively generate at least one first wireless setting signal to eachof said plurality of LED lighting devices to assign a location code byturns according to a location of installation of each of said pluralityof LED lighting devices; wherein upon a completion of said first settingprocess for establishing said database of installed location each LEDlighting device displayed visually on a screen of said mobile devicebecomes identifiable on said connectivity APP (software application) fora user to perform a grouping, regrouping or to control individuallighting performance of each LED lighting device; wherein saidconnectivity APP (software application) operates to activate said secondsetting process to generate at least one second wireless setting signalto each of a selected number of LED lighting devices classified in thesame group for assigning a group code for operating a synchronouslighting performance for said LED lighting devices in the same group;wherein upon a completion of said second setting process for saidgrouping job said connectivity APP (software application) operates togenerate at least one third wireless setting signal to each of saidplurality of LED lighting devices for assigning at least one universalcode to synchronously operate same lighting performance, wherein saidlocation code is used for identifying and controlling lightingperformances of only one individually LED lighting device, wherein saidgroup code is used for identifying and controlling lighting performancesof all LED lighting devices classified in the same group, wherein saidat least one universal code is used for identifying and controllinglighting performances of all of said plurality of LED lighting devicesin said LED lighting system; using a controller electrically coupledwith a switching circuitry electrically connected between a power sourceand a light-emitting unit in each lighting device to output a controlsignal to control a conduction rate of said switching circuitry foroperating said functional performances including an on/off performanceand a dimming performance; using a wireless signal receiver,electrically coupled with said controller for receiving and processingat least two types of wireless external control signals interpretableand executable by said controller; wherein a first type of wirelessexternal control signals is a location code setting signal, a group codesetting signal or at least one universal setting signal generated bysaid connectivity APP (software application) and transmitted from saidmobile device; wherein a second type of wireless external controlsignals is an instruction signal including said location code, saidgroup code or said at least one universal code generated by saidconnectivity APP (software application) from said mobile device; andusing a software program designed in said controller of each lightingdevice to receive and process said location code setting signal, saidgroup code setting signal or said at least one universal code settingsignal to be recorded and memorized in a memory unit for checking andverifying said instruction signal with said location code, said groupcode or said at least one universal code from said mobile device forcorrespondingly operating said functional performances, wherein if acode of said instruction signal is identical to one of said locationcode, said group code or said at least one universal code recorded insaid memory unit, said controller operates to process said instructionsignal to activate a corresponding illumination performance according tosaid instruction signal received.
 54. An APP (software application)based setting method, for wirelessly selecting and exclusivelycontrolling a functional performance of an individual ceiling fan or agroup of selected ceiling fans among a plurality of ceiling fans,comprising: using a connectivity APP (software application) loaded in amobile device to perform two setting processes including a first settingprocess for generating a data base of installed locations for all ofsaid plurality of ceiling fans with each of said plurality of ceilingfans being assigned a location code for identification and forindividual performance control, and a second setting process forperforming a grouping job to establish at least one group of linkableceiling fans with said at least one group of linkable ceiling fans beingassigned a group code applicable to each ceiling fan in said at leastone group for identification and for synchronously performing samefunctional performance; wherein said connectivity APP (softwareapplication) is wirelessly and individually connected with each ceilingfan of said plurality of ceiling fans by turns for generating,assigning, receiving, setting and recording a location code, a groupcode and/or at least one universal code to each of said plurality ofceiling fans, wherein said location code, said group code and or said atleast one universal code are stored in a memory unit of each ceilingfan, wherein after said data base of installed locations for saidplurality of ceiling fans being fully established each ceiling fandisplayed visually on a screen of said mobile device becomesidentifiable on said connectivity APP (software application) to a userto perform a grouping or re-grouping job, wherein said location code isused for controlling an on/off performance and speed performance of onlyone ceiling fan, wherein said group code is used for controlling saidon/off performance and speed performance of all ceiling fans in the samegroup, wherein said at least one universal code is used for controllingsaid on/off performance and speed performance of all ceiling fans; usinga controller electrically coupled with a switching circuitryelectrically connected between a power source and an electric motor ineach ceiling fan to output a control signal to control a conduction rateof said switching circuitry in each ceiling fan for operating saidfunctional performances including on/off performance and speedperformance; using a wireless signal receiver, electrically coupled withsaid controller in each ceiling fan for receiving and processing atleast two types of wireless external control signals; wherein a firsttype of wireless external control signal is a location code settingsignal, a group code setting signal or at least one universal settingsignal generated by said connectivity APP (software application);wherein a second type of wireless external control signal is aninstruction signal including said location code, said group code or saidat least one universal code generated by said connectivity APP (softwareapplication) and transmitted from said mobile device; and using asoftware program in said controller of each ceiling fan to receive andprocess said location code setting signal, said group code settingsignal or said at least one universal code setting signal memorized in amemory unit for checking and verifying said instruction signal with saidlocation code, said group code or said at least one universal code fromsaid connectivity APP (software application) of said mobile device foroperating said functional performances, wherein if a code of saidinstruction signal is identical to one of said location code, said groupcode or said at least one universal code in said memory unit, saidcontroller operates to process said instruction signal to activate acorresponding functional performance according to said instructionsignal received.
 55. A linkable LED security lighting system, configuredwith a plurality of LED security lights with each LED security lightcomprising at least: a light-emitting unit, including at least a firstLED load emitting light with a first color temperature; a switchingcircuitry; a controller; a light sensing control unit; a motion sensingunit; a wireless signal transmitter; a wireless signal receiver; atleast one external control device; and at least one time setting device;wherein said controller is electrically coupled with said switchingcircuitry; wherein said switching circuitry is electrically connectedbetween a power source and said light-emitting unit, wherein said powersource outputs a DC power with a constant current; wherein saidswitching circuitry comprises at least a first semiconductor switchingdevice, wherein said controller outputs a control signal to control aconduction rate of said switching circuitry for delivering an electricpower from said power source to drive said light-emitting unit togenerate an illumination according to signals respectively received fromsaid light sensing control unit, said motion sensing unit, said wirelesssignal receiver, said at least one external control device and said atleast one time setting device; wherein at dusk when a nighttime signalis detected thru said light sensing control unit indicating an ambientlight being lower than a first predetermined value, said controlleroperates to activate said motion sensing unit for operating a motiondetection mode, wherein said controller of each LED security light insaid linkable LED security lighting system is designed to activate saidmotion sensing unit either according to said night time signal beingdetected or according to a detection of a first wireless signal fromsaid wireless signal receiver whichever occurs first; wherein at duskwhen said controller of an LED security light in said linkable LEDsecurity lighting system first detects said nighttime signal thru saidlight sensing control unit, said LED security light acts as a commandingLED security light to synchronously activate said plurality of LEDsecurity lights to operate said motion detection mode; wherein saidcontroller operates to activate said motion sensing unit to operate saidmotion detection mode and at the same time said controller operates towirelessly transmit said first wireless signal thru said wireless signaltransmitter to activate at least one neighboring LED security light insaid linkable LED lighting system to synchronously operate said motiondetection mode; wherein during said motion detection mode when saidcontroller of an LED security light in said linkable LED securitylighting system first detects a motion signal from said motion sensingunit, said LED security light acts as a commanding LED security light toactivate said plurality of LED security lights to synchronously performa second level illumination with a light intensity preset with said atleast one external control device or preprogrammed in said controllerfor a time length preset with said at least one time setting device orpreprogrammed in said controller; wherein said controller of saidcommanding LED security light operates to output said control signal toactivate said switching circuitry to perform said second levelillumination preset with said at least one external control device orpreprogrammed in said controller, at the same time said controlleroperates to wirelessly transmit a second wireless signal thru saidwireless signal transmitter to activate said at least one neighboringLED security light to synchronously perform said second levelillumination for said time length, wherein upon a maturity of said timelength with no new motion signal being further detected said controlleroperates said LED security light to resume to said motion detection modewith said illumination being temporarily turned off pending for a nextmotion signal; wherein at dawn when an LED security light in saidlinkable LED security lighting system first detects a daytime signalindicating said ambient light detected thru said light sensing controlunit being higher than a second predetermined value, said LED securitylight acts as a commanding LED security light to synchronouslydeactivate said plurality of LED security lights in said linkable LEDsecurity lighting system, wherein said controller of said LED securitylight operates to stop outputting said control signal to turn off saidlight-emitting unit, at the same time said controller operates towirelessly transmit a third wireless signal thru said wireless signaltransmitter to deactivate said at least one neighboring LED securitylight to turn off each of all neighboring LED security lights; whereinsaid first LED load in conjunction with a level setting of said DC poweris designed with a combination of said plurality of LEDs in seriesand/or in parallel connections such that an electric current passingthrough each LED of said LED load remains at a level, and a voltage Vacross each LED complies with a constraint of V_(th)<V<V_(max) featuringan electrical characteristic of each LED, wherein V_(th) is a referencevalue of a threshold voltage required to trigger each LED to emit lightand V_(max) is a reference value of a maximum operating voltage acrosseach LED at which at least one LED construction in said first LED loadis vulnerable to a thermal damage; wherein when said first LED load isconfigured with N pieces of LEDs electrically connected in series or Nsets of in parallel connected LEDs electrically connected in series, aworking voltage V_(N) imposed on said first LED load is confined in arange N×V_(th)<V_(N)<N×V_(max).
 56. The linkable LED security lightingsystem according to claim 55, wherein when said first LED load isconfigured with white light LEDs produced by coating at least onephosphor compound on the surfaces of blue light LEDs, said thresholdvoltage V_(th) has said reference value estimated at 2.5 volts and saidmaximum operating voltage V_(max) has said reference value estimated at3.5 volts subject to an operating condition that a working temperatureof each LED connecting pin is controlled at or below 80 degreescentigrade, accordingly said working voltage V_(N) is to be confined ina domain between N×2.5 volts and N×3.5 volts, expressed by N×2.5volts<V_(N)<N×3.5 volts.
 57. A linkable LED security lighting system,configured with a plurality of LED security lights with each LEDsecurity light comprising at least: a light-emitting unit, including atleast a first LED load emitting light with a first color temperature; aswitching circuitry; a controller; a light sensing control unit; amotion sensing unit; a wireless signal transmitter; a wireless signalreceiver; a first external control device; a second external controldevice; a first time setting device; and a second time setting device;wherein said controller is electrically coupled with said switchingcircuitry; wherein said switching circuitry is electrically connectedbetween a power source and said light-emitting unit, wherein said powersource outputs a DC power with a constant current; wherein saidswitching circuitry comprises at least a first semiconductor switchingdevice, wherein said controller outputs a control signal to control aconduction rate of said switching circuitry for delivering differentaverage electric powers from said power source to drive saidlight-emitting unit for generating different illumination modescharacterized by different light intensities according to signalsrespectively received from said light sensing control unit, said motionsensing unit, said wireless signal receiver, said first external controldevice, said second external control device, said first time settingdevice and said second time setting device; wherein at dusk when anighttime signal is detected thru said light sensing control unitindicating an ambient light being lower than a first predeterminedvalue, said controller operates to output a first control signal toconduct said switching circuitry with a first conduction rate accordingto an operating parameter preset with said first external control deviceto operate a first level illumination mode for performing a first levelillumination for a first time length preset by said first time settingdevice, wherein said first level illumination mode is a generalillumination mode with said motion sensing unit being deactivated;wherein said controller is designed to operate said first levelillumination mode either according to said night time signal beingdetected or according to a detection of a first wireless signal fromsaid wireless signal receiver whichever occurs first; wherein at duskwhen said controller of an LED security light in said linkable LEDsecurity lighting system first detects said nighttime signal thru saidlight sensing control unit, said LED security light acts as a commandingLED security light to synchronously activate said plurality of LEDsecurity lights to operate said first level illumination mode to performsaid first level illumination; wherein said controller operates toactivate said first level illumination mode to perform said first levelillumination for said first time length and at the same time saidcontroller operates to wirelessly transmit said first wireless signalthru said wireless signal transmitter to activate at least oneneighboring LED security light in said linkable LED security lightingsystem to synchronously operate said first level illumination mode forperforming said first level illumination for said first time length;wherein upon a maturity of said first time length said controlleroperates to terminate said first control signal to turn off saidlight-emitting unit and at the same time said motion sensing unit ofeach LED security light is activated to enter a motion detection mode;wherein during a performance of said motion detection mode when saidcontroller of an LED security light in said linkable LED securitylighting system first detects a motion signal from said motion sensingunit, said LED security light acts as a commanding LED security light toactivate said plurality of LED security lights to synchronously operatea second level illumination mode to perform a second level illuminationfor a second time length preset by said second time setting device;wherein said controller of said commanding LED security light operatesto output a second control signal to activate said second levelillumination mode to perform said second level illumination preset bysaid second external control device, at the same time said controlleroperates to wirelessly transmit a second wireless signal thru saidwireless signal transmitter to activate said at least one neighboringLED security light to synchronously operate said second levelillumination mode for performing said second level illumination for saidsecond time length, wherein upon a maturity of said second time lengthwith no new motion signal or no new second wireless signal being furtherdetected said controller operates said LED security light to resume saidmotion detection mode with said light-emitting unit being temporarilyturned off pending for a detection of a new motion signal, wherein alight intensity of said second level illumination is either equal to orhigher than a light intensity of said first level illumination; whereinat dawn when an LED security light in said linkable LED securitylighting system first detects a daytime signal indicating said ambientlight detected thru said light sensing control unit being higher than asecond predetermined value, said LED security light acts as a commandingLED security light to synchronously deactivate said plurality of LEDsecurity lights in said linkable LED security lighting system, whereinsaid controller of said LED security light operates to deactivate saidmotion sensing unit and turn off said light-emitting unit, at the sametime said controller operates to wirelessly transmit a third wirelesssignal thru said wireless signal transmitter to deactivate said at leastone neighboring LED security light to turn off said light-emitting unitof said at least one neighboring LED security light; wherein said firstLED load in conjunction with a level setting of said DC power isdesigned with a combination of said plurality of LEDs in series and/orin parallel connections such that an electric current passing througheach LED of said LED load remains at a level, and a voltage V acrosseach LED complies with a constraint of V_(th)<V<V_(max) featuring anelectrical characteristic of each LED, wherein V_(th) is a referencevalue of a threshold voltage required to trigger each LED to emit lightand V_(max) is a reference value of a maximum operating voltage acrosseach LED at which at least one LED construction in said first LED loadis vulnerable to a thermal damage; wherein when said first LED load isconfigured with N pieces of LEDs electrically connected in series or Nsets of in parallel connected LEDs electrically connected in series, aworking voltage V_(N) imposed on said first LED load is confined in arange N×V_(th)<V_(N)<N×V_(max).
 58. The linkable LED security lightingsystem according to claim 57, wherein when said first LED load isconfigured with white light LEDs produced by coating at least onephosphor compound on the surfaces of blue light LEDs, said thresholdvoltage V_(th) has said reference value estimated at 2.5 volts and saidmaximum operating voltage V_(max) has said reference value estimated at3.5 volts subject to an operating condition that a working temperatureof each LED connecting pin is controlled at or below 80 degreescentigrade, accordingly said working voltage V_(N) is to be confined ina domain between N×2.5 volts and N×3.5 volts, expressed by N×2.5volts<V_(N)<N×3.5 volts.
 59. An APP (software application) basedlinkable security lighting system, configured with a plurality of LEDsecurity lights with each LED security light comprising: alight-emitting unit, including an LED load; a switching circuitry; acontroller; a light sensing control unit, electrically coupled to saidcontroller for detecting an ambient light level and accordinglyoutputting a nighttime signal when said ambient light level detectedbeing lower than a first predetermined value or a daytime signal whensaid ambient light level detected being higher than a secondpredetermined value; a motion sensing unit to detect a motion intrusionand accordingly to output a motion signal to said controller; a wirelesssignal transmitter, electrically coupled to said controller to transmitwireless control signals comprising instruction codes, said wirelesscontrol signals including a first instruction signal triggered by saidnighttime signal, a second instruction signal triggered by said motionsignal and a third instruction signal triggered by said daytime signalfor communications within said APP (software application) based linkablesecurity lighting system; a wireless signal receiver, electricallycoupled to said controller for receiving said wireless control signalsincluding said first instruction signal, said second instruction signaland said third instruction signal for communications within said APP(software application) based linkable security lighting system; a firsttime setting device electrically coupled to said controller; a secondtime setting device electrically coupled to said controller; and a thirdtime setting device electrically coupled to said controller; whereinsaid controller is electrically coupled with said switching circuitry;wherein said switching circuitry is electrically connected between apower source and said light-emitting unit to transmit different electricpowers to said light-emitting unit for operating different illuminationmodes controlled by said controller according to signals respectivelyreceived from at least said light sensing control unit, said motionsensing unit, said wireless signal receiver, said first time settingdevice, said second time setting device and said third time settingdevice; wherein a connectivity APP (software application) is loaded in amobile device, wherein said connectivity APP (software application) isan interface between a user of said mobile device and said linkablesecurity lighting system, and is designed to enable said user to controllighting performances of said linkable security lighting system; whereinsaid connectivity APP (software application) is configured with twosetting processes, wherein a first setting process is to establish adata base of installed locations for all of said plurality of LEDsecurity lights with each of said plurality of LED security lights beingassigned a location code based on its installed location foridentification and for individual control thru said connectivity APP(software application), wherein a second setting process is a groupingjob to divide said plurality of LED security lights into at least onegroup of linkable LED security lights with each group being assigned agroup code applicable to each LED security light in the same group foridentification and for synchronously performing same illuminationfunction, wherein said grouping job includes an option of composing allof said plurality of LED security lights in one group with each LEDsecurity light being assigned at least one universal code tosynchronously control lighting performances of said all of said LEDsecurity lights in said linkable security lighting system; wherein whensaid connectivity APP (software application) is wirelessly andindividually connected with each LED security light of said plurality ofLED security lights by turns, an item identification code of each LEDsecurity light is received, saved and assigned a pairing location codeby said connectivity APP (software application) based on its installedlocation; wherein upon completion of said by turn connection, said database is thereby established for communications between said controllerof each LED security light in said linkable security lighting system andsaid connectivity APP (software application) for controlling variouslighting performances; wherein said location code, said group codeand/or said at least one universal code are stored in said connectivityAPP (software application) of said mobile device and in a memory unit ofsaid controller of each LED security light; wherein after said data baseof installed locations for said plurality of LED security lights beingfully established each LED security light displayed visually on a screenof said mobile device becomes identifiable on said connectivity APP(software application) to said user to perform a grouping or re-groupingjob, wherein said location code is used for controlling only anindividual LED security light, wherein said group code is used forsynchronously controlling all LED security lights in the same group,wherein said at least one universal code is used for synchronouslycontrolling all LED security lights in said linkable security lightingsystem; wherein said controller is designed with a software program toverify said wireless control signals received from said wireless signalreceiver, wherein if said wireless control signal comprising aninstruction code is identical to one of said location code, said atleast one group code or said at least one universal code in said memoryunit, said controller operates to process said wireless control signalto activate a corresponding illumination performance according to saidwireless control signal being said first instruction signal, said secondinstruction signal or said third instruction signal; wherein saidcontroller is designed to activate said LED security light eitheraccording to said nighttime signal being detected by said light sensingcontrol unit or according to a detection of said first instructionsignal received from said wireless signal receiver whichever occursfirst; wherein at dusk when said controller of an LED security light ofsaid plurality of LED security lights first detects said nighttimesignal from said light sensing control unit, said LED security lightacts as a commanding LED security light to synchronously activate saidplurality of LED security lights to operate a first level illuminationmode being a general illumination mode to perform a first levelillumination for a first time length preset by said first time settingdevice with said motion sensing units of said plurality of LED securitylights in said linkable security lighting system remaining deactivated;wherein said controller of said commanding LED security light operatesto activate said first level illumination mode to perform said firstlevel illumination for said first time length, at the same time saidcontroller of said commanding LED security light operates to wirelesslytransmit said first instruction signal with a first universal code toall neighboring LED security lights thru said wireless signaltransmitter to activate all neighboring LED security lights tosynchronously operate said first level illumination mode for performingsaid first level illumination for said first time length; wherein upon amaturity of said first time length said controller of each LED securitylight operates to control said switching circuitry to reduce saidelectric power transmitted to said LED security light to operate asecond level illumination mode to perform a second level illuminationfor a second time length preset with said second time setting devicewith said motion sensing unit being simultaneously activated to operatesaid second level illumination mode being a motion sensing mode; whereinduring said motion sensing mode when said controller of an LED securitylight of said plurality of LED security lights first detects said motionsignal from said motion sensing unit, said LED security light acts as acommanding LED security light to activate said LED security lights inthe same group to synchronously operate said motion sensing mode toperform a third level illumination for a third time length preset withsaid third time setting device; wherein said controller of saidcommanding LED security light operates to activate said motion sensingmode to perform said third level illumination for said third time lengthpreset with said third time setting device, at the same time saidcontroller of said commanding LED security light operates to wirelesslytransmit said second instruction signal with said at least one groupcode to activate at least one neighboring LED security light tosynchronously perform said third level illumination for said third timelength, wherein upon a maturity of said third time length with no newmotion signal or no said second instruction signal being furtherdetected said controller operates to resume said motion sensing modepending for a new motion signal, wherein a light intensity of said thirdlevel illumination is higher than a light intensity of said second levelillumination, a light intensity of said first level illumination ishigher than said light intensity of said second level illumination, andsaid light intensity of said third level illumination is equal to orhigher than said light intensity of said first level illumination;wherein at dawn when said controller of an LED security light in saidAPP (software application) based linkable security lighting system firstreceives said daytime signal from said light sensing control unit, saidLED security light acts as a commanding LED security light tosynchronously deactivate said plurality of LED security lights in saidlinkable security lighting system, wherein said controller of saidcommanding LED security light operates to turn off said light-emittingunit, at the same time said controller operates to wirelessly transmitsaid third instruction signal with a second universal code interpretableand executable by all neighboring LED security lights thru said wirelesssignal transmitter to deactivate and turn off all neighboring LEDsecurity lights.